If this relationship is pushing you to a point where you need psych meds, it's a toxic relationship. It has nothing to do with astrology. You obviously have more serious issues to work out if there is so much stress it takes medication to deal with this person. These two Sun and Moon positions are compatible, but there could be other incompatible aspects or many other things in your birth charts, causing problems in getting along. But I would get better and try not to make astrology the scapegoat. An astrology chart is based on a lot more than the Sun and Moon of two people, and these signs in themselves wouldn't be difficult. Perhaps you both aren't ready for a relationship? It doesn't sound like a positive situation, and I am not a medical professional. If you are married or living together, perhaps go to couples therapy. If you haven't been together too long, move on. I do wish you all the best, I hope you feel better, and don't stay in a relationship that makes you ill.