Anyone have any experience or knowledge on chemical pregnancies?

Megan
I want people honest thoughts if you have been through this before.  Here is my series of events:
June 7th would have been roughly 11 post ovulation . I bleed pretty heavy this day
June 8th still bleeding but has lightened some
June 9th should have used a pad for simple light spotting.  
I figured I had my period start a few days early. Well..... Along comes Saturday and I'm feeling a bit off. 
June 11th took a First Response hpt and it was an immediate BFP
I called my PCP since I was already scheduled for blood work to have them run a blood HCG for me.  I got the results back yesterday and I was told they were really low at 141.  My OB then had me come in yesterday afternoon for repeat blood work, but I will not have the results until Monday..... Anyone have any thoughts? 
From what I have read... Typical chemical pregnancies are roughly a week after your missed period. But I'm just kind of lost.