Question? Someone pls help sorry it’s long

So after 4 months of not having a period I went to the dr and they did an ultrasound on my ovaries since we knew I wasn’t pregnant just to see what was going on everything came back normal. So 4 months later I finally got my period and got on the pill to regulate my periods but I stopped taking them on about day 3 or 4 because I couldn’t deal with how sick they made me about a week after I got my period but it was so heavy to were I had to change my tampon and pad every 15 minutes or I’d bleed through it lasted about 4 5 days. I have had unprotected sex it’s been about a week since but it was multiple times within 5 days since my cycle is all wacky could I have ovulated right after my second period ? Like 2 days after boobs were so sore I’ve never experienced them being that sore and I’ve been super constipated (tmi) also really crampy to where it feels like I’m going to start my period again & ive been so tired I know with this all being last week it’s way to soon I just feel like somethings up. Someone please help with advice or if they been through something similar