NOT PREGNANT

On July 20 I got the worst phone call ever.  After doing our first IUI 2 weeks prior, having good progesterone levels a week prior, we got the phone call from RE office saying blood test was NEGATIVE.  WHAAATTTT how could this happen?!!! I serouisly had to hold on to the bed to keep from falling because I just couldn't understand.  Here's the thing with unexplained infertility...Everthing is normal, so you think(well at least I do) you do this "extra" push every test during the process is normal and timing seems correct, but yet still no pregnancy!!!!!!!!!! SIGH well we're still praying....we still TTC, and we refuse to give up!! I know it's in God's pland for us to conceive.