Could i b pregnant?? I had a very Weird period

I am 37 years old with pcos, & i am hypothyroid but being on metformin my periods are pretty predictable, i always go 4 days very heavy then im done, well my husband & i are really trying to concieve & have been for 19 moths, but i am on day 8 of my   cycle & it was really lite compared to normal, then one day i poured blood uncontrollably but with no pain ( i have had 3 miscarriages & it dis not feel like one) i am still spotting  on day 8 & i never go more then 4- 5 days tops . Could i b pregnant?