Thank you for everyone's responses! As it turned out I wasn't pregnant which in the end I half expected. What a great lesson for me though. The nurses DID tell me NOT to take a HPT as it would show a positive result. With all the symptoms though I still decided to take a test, which came up positive, only to result to in a negative blood test. We are now on a 2nd round of IUI and I WILL NOT be taking a HPT this round. It actually helps with the nerves as well!!