I need help bad

Okay so basically after losing my virginity about 3 months ago I never feel right. I kept getting yeast infections. I’m not pregnant and I don’t have any STDs (I’ve tested) so I’m just miserable. I keep getting colds (it’s flu szn and I’m in college but still) I just feel like sh*t. I’m starting to feel better because I used to be nauseous 24/7 (which is why I tested for pregnancy even though I never missed a period). My tongue was hurting (which is so weird) and my taste buds swoll up. I’m just out of wack. But now I’ve starting spotting in between my periods (normally like a week in advance) just like today. And my discharge has been thick and the color seems off. A most importantly after having sex for the time (I haven’t done it since) I literally haven’t been able to wear tampons comfortably. Andddd most importantly my actual vagina (the internal vagina) literally hurts hurts it feel like I’m pulling a dry tampon out constantly. And I had a huge puss bump by the opening on my vagina and it hurt like a b**ch. I’m just so sad because I don’t feel right and I’ve been in and out the doctors and I’m clean so I just don’t know what to do. I’m thinking it might be my birth control pill (I’ve been on it for a long time). Idk has this happened to anyone else or anyone else have similar experiences. I feel like I’m at a loss. I wanted to have sex for the first time since my first time over the weekend but I’m scared I’m going to be more f*cked up or it’s gonna hurt.