Bleeding at 4 weeks (HCG levels 16)

I’ve had a roller coaster ride. I received multiple positive pregnancy results which was also confirmed by my doctor. My HCG levels came back at 16 yesterday. The same day I started experiencing bright red bleeding with cramping. I am still bleeding today however my cramps aren’t there. It’s not heavy enough to fill a pad but it has more of a period like consistency than spotting. This is my first pregnancy and I’m so overwhelmed. Based on my last periods I am 4 weeks and 4 days. Has anyone experienced this and continued with a successful pregnancy?