3 positives on 88 cent test & 1 BFN on FRER?!

Dani πŸ’• β€’ 23, PCOS, & Pregnant w/ baby #1 ✨🍼 Due 01.31.19 β„οΈπŸŽ€πŸ‡²πŸ‡½

So since 10 DPO I had gotten faint positives for three consecutive days and then today I tested with a First response early result and I got a negative! I’m so confused. πŸ˜• I thought FRER were really sensitive? 😩 Anyone have this happen before?