I am pregnant. I went to the doctor last Thursday first visit. They said I should be 7 weeks by first day of last period. Well they did a ultra sound and saw nothing. My uterus was thick though. They gave me a blood test and my hcg levels was 3500 they said they should see a sac at that level. Next day hcg was4100 I'm scared they said it might be tubal pregnancy. Is it a poss that I could be just to early