Wow, Scorpio rising, Moon in Cancer, Sun and Venus and Mercury in Pisces - that's all water signs only! No wonder emotions turn your world upside down easily. The cure for too much water influence would be to get structure in your life, establish some useful habits that you follow thru no matter what. Or get some friends that have a lack of water influence in their charts. As for the overthinking and analyzing, the way to get out of your head is by getting back into your body, i.e. go outside, spend some time in nature, do some sports or physically exhausting work. That will bring you back into the here and now and ground you.