Hi Diana,
The enouragement is that you have a positively aspected natal Sun in its own sign in the 1st house to a Jupiter optimism in Aries. That's a lot of big heart, good-willed power working within you to get you through any difficult (also physical) situations.
In medical astrology Jupiter rules growths of all kinds, including that within the body.
You also have Moon (fluids)-Pluto(cells) in Libra (ruler kidney, renal system) in the 3rd house of the mind processes, which can also be influenced by the effect of sibling relationships upon you. O.k., the conjunction can have a way of placing obsessively(Pluto) worrying(Moon) feelings that can influence
a thoughtful mind. Yet this doesn’t infer that such feelings/thoughts are going to happen: Thoughts and feelings aren’t deeds. The conjunction makes no adverse aspect, so one might also not be adverse in thinking that anything of a Plutonic nature (ruler 5th -self expression) could be a friend rather than enemy in coping with any situations of an overpowering, overwhelming nature.
The issue could lie more in natal Saturn in 12th house, ruler 6th house of (chronic) physical complaints, that is the apex of the T-square with Jupiter-Chiron and Uranus. Unfortunately, as you may well be aware, harsh Jupiter-Saturn aspects have a reputation for the high-high, low low mood swings. One can hardly be expected to be joyful at a worrying medical diagnosis. The Libra pendulum will obviously swing to the other side to create the shock effect that is associated with Uranus.
Tr. Uranus has been effecting that T-square for several years. Can you pinpoint any changes within the house positions and/orplanetary rulerships with which brought about an internal, emotional pain (Chiron) that you have had trouble accepting (Saturn?). The holistic astrology I study implies that physical issues find their source in such situations.
Pluto in ourselves represents the total destruction of any system in order to re-generate new (proverbial) cells of growth. If Saturn brings endings of past situations, yet that still linger to have an effect upon one's self, it is Pluto that annihilates and finalises them, never to return.
You are concerned about inheritance of disease. The 4th-12th houses have links with hereditary and ancestral situations. You are not them; you may carry genes, yet you are also a unique individual in yourself with a different life road map to follow.
It could well be that tr. Uranus within and upon yourself will bring about the necessity of independent change, whereby tr. Pluto allows a vicious circle to be destroyed once and for all.
Secondary progressed Sun can then enter Libra without concern for the future.
As with any astro. interpretation, it all depends upon how it is received, taken, and/or discarded.
Encouraging enough?