Had chemical pregnancy two and some odd months ago, odd periods after?

So in mid february my boyfriend visited and we had maybe four or so unprotected encounters? Neither of us felt that concerned about having getting pregnant so we just kind of let fate do it's thing. Two weeks after he left, on the 27th of february, I had been feeling really odd. My body felt different. So I took a test and I got the faintest positive ever. My sister had one like that which worried me so badly so I bought a few more and the rest were all negative. Alright. So a few days later, a day after what would've been my missed period, I got it but it was SUPER heavy. I had big clots and it hurt so bad; I remember thinking it was weird it was bright red but I also know sex messes with the cycle. It wasn't until about a week or so later when my friend's sister had a miscarriage and the first thing she said to me was,"her period was like yours!" that made me think oh man. Maybe it was. But I also though, well, it would've been something like two-ish weeks, it supposedly happens all the time, it was a week ago. Move on. My period came normally, around the date it always does, the next month but I honestly can't remember if anything was odd about it. And the month after it was a little off. But this month it's horrible. It was a few days late and hurts like the last one did.  There's bright red and pink blood but there seems to be hardly anything on a pad, only a tampon and even then it seems light, and I have so much pressure in my lower abdomen and little clots are coming out, which is fairly unusual. The cramps seem heavy too and I'm so tired all the time; it's just abnomal but I've been feeling how I felt before I took that one slight positive test and these are the only two times it's happened and felt *so* bad. I tested, feeling off about a week ago, just out of curiousity but it was negative. I've been feeling sick lately; but not flu sick. I feel nauseous and have head some head aches, some dizziness. But I never even considered that *maybe* since my body hasn't been right since that last heavy period that something weird is going on-it might not even have anything to do with pregancy since a million things can be wrong with all the symptoms I just said. But when I do the pre-see the doctor worry web MD google stuff everything that pops up is about pregnancy! I'm just wondering if it's an idea I should float to my doctor because I feel crazy even typing this.