False positive?

I just got the implant (nexplanon) removed in January and gotten af February 26 and it stopped March 1. I’m having every symptom like I always do for my period but no period? I took a pregnancy test once I was a week late and it was negative. But I just checked it a hour and a half later and it’s now positive. A very skinny faint line. Opinions? Also I’ve been having cramps like crazy for 2 weeks now