subchorionic hematoma

Ma

I'm 18 weeks and 2 days and just found out I have one. I have had no bleeding but the last 4 days ive been in so much pain that I thought I was in labor. I have an ultrasound may 7th to see how it is doing but has anyone had great outcomes? I didn't even know I had it until today, my last ultrasound was at 8 weeks.