My LMP was feb 18 and had a positive hpt on April 6. However, I had slight bleeding a week before I decided to take the test. Doc ran HCG tests first one 1328 next one 48 hours later 1986 and then 96 hours later dropped to 1683. I just went in for a peace of mind check becasue I was having terrible cramps w/o bleeding and was nervous about a miscarriage, doc couldn't see a sac on her ultrasound machince and said after two more weeks she wants me to go to H to do a transvag U/S if bleeding hasn't started. One more bit of information that may help...when I was pregnant with our first the doc told me that I wouldn't beable to conceive without using fertility drugs because my progesterone was so low, at the time of that test it acutally turned out that I was already pregnant with a healthy baby boy who is now 6 years old I never had to use the fertility drugs! Could this be related HCG and low progesterone levels??