subchorionic hematoma !!

I am currently 10 weeks 4 days pregnant last week I bleeded gush of blood a big clot came out went to the E.R baby doing perfectly fine thank god doctor told me the big clot I pass was the hematoma they did tranvaginal u/s they didn't see the hematoma the baby perfect fine just started be bleeding again last night and today no clots it's come and goes it's my first pregnancy so I'm am scared doctor said is normal to bleed but it's still scary !