My first instinct was to take a look at your Mercury and to see what it was doing in your chart. It's in a special condition, for it fits the criteria of an
unaspected planet. This is a planet in the chart that makes no ptolemaic aspects (conjunction, opposition, square, trine, sextile) to any other planet in the chart. It's disconnection from the rest of the chart may show up as an incessant focus on what it signifies (which may lead to overcompensation), wild "feral" talent, or a source of difficulty and problems because it is hard to integrate the energy with the rest of your chart. Or all three at different points of your life.
At the end of 2014, this unaspected Mercury was getting hit by the Uranus-Pluto square in Aries-Capricorn. Both transits would have put pressure on your Mercury, especially Pluto who's effect can be "annihilating".
Mercury/Pluto may have increased obsessive thinking, paranoia, and would have added a dimension of heaviness to communication that wasn't there before (especially where having a 5th house Mercury is concerned, where conversation would definitely be a source of enjoyment). Mercury rules the 8th, which indicates the "excitement" of 8th house themes during this time. The more "intense" psychological states (anciently "anguish of the mind") may have heightened during this time - fear, anxiety, insecurities, perhaps issues around sexuality (Mercury rules both the 5th and 8th in your chart) could have assailed you.
Pluto would have been located in the 11th house of associations and wider groups - you may have felt like "everyone" was judging you negatively and this may have shaken your confidence whenever you had to speak to others. You may have projected this inner judgement unto the world around you, or conversely, you may have very well gone through some sort of bullying from your peer group. Was this the case for you?
This first time-frame I see as chiefly Pluto's doing, although Uranus may have caused some shake-ups and surprises that probably didn't help your peace of mind.
In late 2018, Saturn would have been within orb of opposition to your Mercury, and you expressed that you actually started to feel more aversion around people. Saturn is another planet that would increase feelings of judgement and inadequacy in a person, as well as make one aware of the limitations of one's capabilities. The thing about Saturn is that it can be pessimistic, and skew the results toward the more negative. Things may not be so bad, after all. Once again the field of influence that Saturn would be felt is in the 11th house, the social house of the wider world around you, hence isolating yourself from others.
Since Mercury is unaspected, you would want to look at what its dispositor (the planet that rules the sign a planet is located in) because this is one of the ways that an unaspected planet can find integration with the rest of the chart - it will draw on this relationship more because of its disconnection to everything else. What rules Mercury in this chart is the Moon - she is located in Taurus, conjunct Saturn and is located in the 3rd and within distance of the cusp of the IC. Also (and I think very importantly) she is also connected to the fixed star Algol. The combination of Moon/Saturn/Algol would mean that the emotional nature is quite serious and heavy, and Algol adds extreme passion of the kind that can make one "lose one's head". It's a combo that is harsh on the emotions, but potentially very creative and willing to put into actuality said creativity, since the practical energies of Saturn and Taurus are implicated in the configuration.
With Mercury in Cancer and the Moon in Taurus, both planets are in a relationship referred to as "generosity" - meaning that both planets are in the others sign but with no aspect between them. This indicates a melding of energies that while not as strong as mutual reception, would still be beneficial to the planets involved. It can be thought of in a similar way to the sextile - opportunity is there if you consciously work at it.
While your ability to express yourself in conversation and in an breezy extraverted manner might have taken a hit, the chart indicates that you have a vast ability for creativity and self-expression, maybe even some mechanical ability, too (unaspected Mercury in the 5th, exalted Moon/Algol in the 3th, Mars/NN conjunction). Have you ever thought to express yourself more seriously through the written word, art or a creative hobby that utilizes the hands? I think there is a lot of potential there for you, with the energies you have at your disposal.
Algol - I think you will find this article on Algol enlightening and valuable.