Opinions?!?

So I'm TTC like everyone else on here and I thought I did pretty good last month. first time using opk and seemed like the positive test coincided perfectly with my EWCM and BD days. But after sex Thursday night, there was a little blood when I cleaned up. And the next morning it was heavy ( not as heavy as the first day of my period usually though) and it was more clot- like than usual too. But the flow slowed down quickly and by the middle of the day on day 4, there was nothing! My periods are always 5 days. 5 FULL days. But I had started some moderate exercise and eating a little better as well as drinking a lot more water, so my cousin said that could have lightened my period, which makes sense. I also usually have breast tenderness the week before AF and stops the day before I actually start. But my left boob ( yes, just the left) has not stopped hurting. I started Clomid and a prenatal yesterday. Today I woke up super nauseous and exhausted. IDK if it's life and the medication combined or if my ' period' was implantation bleeding. I have PCOS so testing is never my first solution because I'm tired of heartbreak. But now, I'm really not sure