Could You Give Me A Brief Answer,or Your Thoughts About

Could you give me a brief answer,or your thoughts about my situation? I believe I may have cyclothymia..i've been depressed for 7 years,and the past 4 have been even worse cause i have this wierd mood swings..i have periods of depression that last for a month sometimes two,then sometimes i feel okey,normal for some time and then there are those happy periods where i'm just really happy,talkative and i'm talking a bit faster even people told me that,i'm out going want to go to partyes, i'm going on dates with way too many people in really short period of time..this last for like 4-5 days, max a week. I don't know if that's how I am,like my personality, but i don't think it is..i feel horrible,sick... And sidenote..I self harm, also there were few times i self medicated. Thanks!