Im madly in love with my ex....?

I am a bit confused, were you mean just while on meds or were you mean after you were off of them also? If the mood swings were just while you were on medication he should understand. If you were still being a "*****" when you got off them you need to figure out why and find a way to calmly explain to him why you were the way you were. If you do not know why you are acting the way you are you cannot expect him to. If you are having mood swings he may be leary of when the next one might hit.