Bfp with dollar store cheapie BFN frer

Amber

Hello, I have been ttc over 4 long years. I’m currently 13dpiui and 15dpt and this morning I got a bfp on the dollar tree test, I took two frer and nothing! Ugh!!!!! I can’t catch a break I swear. Has this happened to anyone and you turned out pregnant? Thank you in advance ladies.