clomid and first pregnancy

My husband and I had been trying over a year so we consulted a fertility specialist who after testing suggested clomid. Took my first pill 2/6 and first positive ovulation was 2/14. No surge was detected but positive low HCG on 3/14. I have had bleeding since 3/11 and my dr is setting up an ultrasound to rule out ectopic. Has anyone else run into this, what was the outcome? They think I'm about 5wks