Go back to the Gyn FASTTTTTTTTTT you can have an Etopic Pregnancy the egg is in the tubes and becuse you had them tied it is stuck in them and can't drop into the Uterus if you do not want to die go and FAST.
Actually it IS possible to get a false positive on a HPT. Fertility drugs and some very serious medical conditions (such as certain forms of cancer) result in accumulation of enough HCG in the system to cause a positive reading on a test.
Get an appointment right away! You would die if it was etopic and nothing was done about it. It is never too soon to get that checked! ALso, there is never a false positive pregnancy test, whether faint or not, there can be false negatives but nto false positives!
Make an appointment with your doctor ASAP. Yes, it could be eptopic was can be very dangerous.