I don’t know what’s going on...

So over the course of the last month my boyfriend and I have gotten intimate a lot more frequently than normal. Then a couple weeks ago I got my period but it was lighter than normal and when I went to the bathroom I noticed a tan colored object that looked to be the consistency of a blood clot. It was slightly bigger than the size of a quarter. I thought it was strange but I assumed it might be a bizarre looking blood clot. Then today I went to the bathroom to urinate, let it also be noted that I’m not on my period currently, and I noticed that a tan object was in the toilet again. I’m not sure if I’m possibly having a miscarriage, or if these are symptoms of the beginning of a pregnancy or something else entirely. I’m also on birth control and my boyfriend and I were careful to use condoms most times we were together. I don’t know if anyone has had a similar experience before or if I should just go to a doctor. Any answers will be appreciated