I Found Out I Was Prego On Wednesday And Started

I found out I was Prego on Wednesday and started bleeding like a normal period on Saturday went to the hospital they said more and likely I was having a miscarriage I went to the Dr on monday they did an ultrasound and could not see any signs of a baby or sac check my hcg levels went bk on Tuesday to get the results my levels was 384 and went down to 344 could I still be Prego