So confused .

Sarah
I did my first treatment with Clomid in October . 
I was told to start having sex every other day on cycle day 10. 
I have very irregular periods because of PCOS .
So I don't know when my next one is , but for the last two weeks my breast have been so sore I cannot even lay on my stomach . That's never been a issue with my period. I took 2 test , 1 last week and 1 today both negative . 
Should I got to dr ? What's going on ? Been TTC for 2 years now .