I went off bc in October, then got my proofs November 15-19th, heavy flow. No peroid in December at all, all I got in December was I got sore nipples and what appeared to be bloating. I took hpt like 10 times after my missed peroid ( should have been Dec. 14-18) then i ovulated December 21st( I knew cuz I was taking opk) then January something ( it was last Friday) started spotting, then nothing the next day, then Sunday I started bleeding lightly( a light tampon would be best have used) and Monday same thing but got lighter. And Tuesday it stopped all together. I took hpt again and nothing. There was no clots at all or anything just red blood. 

Could it be that I am pregnant by my levels are low or something like a chemical pregnancy