Dark brown period

Hi ladies I have been really unhealthy for the last two months. I think I’m losing a little weight (120 now probably lost 3 pounds)

My period has been little.

I do not have sex just oral and grinding with boxers on

It’s been two days dark brown medium to heavy spotting

But now it is still dark brown and has those clumps?

I always fear it could be pregnancy just cause but what could it be?