Is this a false positive?

I’ve taken this test since Christmas <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a> and gotten two normal like periods right after without any blood clots in it. I realized my cramps weren’t normal. I’m not the type to get bad cramps and back aches on my period but now I do. Could this be a false positive or it’s just an unusual pregnancy????