If you are worried, this is not the place to run to for help, go to your doctor. Its a forum to discuss, not diagnose.
i have been tested for an sdt at my doctors. i have only been with one person. and he has only been with me. i dont have an std.
the other posters are right you can't be 100% that it's not an std/sti. you need to go to the doctors for blood testing to be sure.
if you are sexually active, then you need to get tested at your doctor for stds. Unless you get tested, you cant be totally sure. You can contract stds without having sex. Its transfered thru bodily fluids, mucosal tissue, blood.
go to your docs they will do a blood test which is more acurate but if your having strong symptoms it means theres a lot of hcg, therefor it would of shown on the hpt
well i dont have an std. i know that for sure.
you also have symptoms of an sti or std
go get tested,
if you took the test 14 days after you had sex then it should be accurate