HELP! BFP on 12/21 and now??

I had a BFP on the 21st. Had light spotting last night (12/23 CD 30) and have been light all day today but definitely more than last night. As of yesterday I was 3 days late and had confirmed with 2 BFPs. Even this morning I tested and had a very faint positive. It was much lighter than yesterday’s test, but I didn’t test first thing today n the am. I’m worried 😟...thoughts?