TMI* Brown Discharge

I had a bleed at 12w, had a US and all was fine. Had another US on Wednesday (13w) and again baby was great. Ob said the bleed didn't come from baby. I had been spotting after the bleed on and off then it stopped for a couple of days but today it's back and it's a lot. Every time I wipe there's lots there. It literally went from nothing for 2 days then back but like an extra amount. It's always brown. But because it stopped and started I'm panicking 😔😔