False Positive, Positive or EVAP? PLEASE READ

Elizabeth

So I stopped my combination pill a week or 2 ago and immediately got what I think was my period (I've experienced withdrawl bleeding before and its never as heavy as my period). Anyways right after my period ended I had unprotected sex the day after and then again 2 days later and we both came more than once each time. 3 days after the last time we had sex, I jumped the gun and took an EPT test. At first it read negative which I expected becaise I tested too early. So I quickly got up and left the bathroom and put the test away. Something told me to check again and the next day it says positive. Is this actually positive or just and EVAP line?