diff pathology labs rate diff levels as +ve. This pgcy, I had a _ve Bt, two days later two +ve HPT's and Dr refused to do another BT as he said the levels would prob be inconclusive, so I went back 5 days later and it was +ve, but low. I spotted and had to have repeat BT's, but they all showed very big rises so I was def preg (u/s confirmed). Goodluck honey. I think u r def preg and this ones going to be a sticker too...