Blood Clot or MC?

My last period was exactly two months ago (Sept 12). Every pregnancy test I’ve taken has come up negative. A couple of weeks ago I had what I thought was very faint implantation bleeding. Lately I’ve been feeling really tired with no sex drive and lost my taste for alcohol. This past week it’s been especially bad. I’ve had nausea, no appetite, sweats/chills, some cramping and really sore nipples. I’ve been feeling emotional too. Today I woke up with bad cramps and a few hours later passed this. I think it’s just a clot but I’m not entirely sure. Any thoughts? :(