babi_gurl,

I think First Response HPTs are supposed to be ok. I think just wait for the bt now.... only a few more hours. Then hopefully you'll know for sure one way or the other. I agree with LuLuLamby it may be possible that the tests you did at home picked up a very early chemical pregnancy and that by the time you got to the doctor the hCG levels had dropped giving you a -ve result there OR that the doctor's tests weren't sensitive enough.

Good luck tomorrow - let us know how you go!