Wats ur periods like regularv? 26days since ur last period.u may or may not be pregnant. Get a urine east done.actually two kits get them .morning sample.
It's possible it's just to early. I had this happen to me. I had positive home tests but negative blood tests. 3 weeks later I went back to my obgyn for another blood test and it came back positive for pregnancy. I am now 33 weeks pregnant.
Take another test, it's weird how it gave you positive at the E.R and negative at a clinic though. Maybe just go visit your OB