symptoms are far more intense than anything I had before

I'm fresh 18 and have irregular periods since I was 11. I was on BC from age 13-17. Depo shot from 13-15, then the nuva ring til a couple of months after my 16th, then the implanon til a month before my 17th, and the pill from til 4 months after my birthday. I only had regular periods from the ring & pill. I haven't been on BC for a year. I had surgery for Polycystic ovary syndrome on Feb 22nd. My last period was the week followed. For 3 weeks as of today, I've had fainting spells (which I thought was caused from just donating blood 2 weeks ago), sore swollen boobs, can't fit my bras I normally wear and been stuck with wearing sport bras (thought it was caused from ovulating for the first time or my boobs growing but never had growing pains and they're 38Ds), I can recall almost every detail of dreams every night since the beginning of this week which I could never do before, I take small naps almost everyday since last week (think its from staying up too late and waking up early), constipation since last week (think it's from switching from whole milk to 2% milk which would be odd) and today when I used the bathroom this morning i had pink/brownish blood then small clotting when I used the bathroom a hour later (the first day of my period since my first I've always had fresh blood, never pink/brown til the last day of it) I've never had PMS before or during periods and don't know how ovulation pains feel since I don't know when or if I've ever ovulated before. My boyfriend and me use condoms but there are some days that we didn't cause we were out but were in the heat of the moment. He did pull out (even though it isn't that affective for preventing pregnancy at least we tried to since there were no condoms). I took a home test 2-3 days ago and came out neg. but then this morning happened with the light bleeding. I want a baby, but not right now. I'm 2 months from graduation with no job cause I wanted to focus on my senior year. In the past I've had symptoms before starting BC and after stopping BC and would take blood/urine pregnancy tests, but came out neg. so my minds set that it's going to be hard to get pregnant anyways. The symptoms I'm experiencing are far more intense than anything I had in the past. I'm scared I might actually be..