False positives? This is impossible..

Here's a stumper for you.

My boyfriend left for the military July 3 (a little over 3 weeks ago) we haven't had sex since July 7 or 8 (he came inside) but then July 10 my period comes and it's heavy.

Fast forward to today. I obviously have not had any form of sex since the beginning of the month. I've been feeling extremely sick lately so I decided to take a test to be a safe. It was an extremely faint positive. I took another and the same thing. I know blue dyes aren't good but I'm gonna get a FR in a little bit.

What could this mean? False positives??

*** not evaps. They were there immediately