False positive?

Lacey • Married 💏💍 Two kids 👦👧 🤰#3

Yesterday I took two pregnancy tests strips. Both were faint positives. Today I’m 13DPO and I took a FRER first thing this morning. Within one minute into waiting for the results, it was positive. I went ahead and requested to take a pregnancy test at my clinic. I already did that today and just got the results, which were negative. Has this happened before with any of your previous pregnancies? I was so excited to tell my family this weekend but now that excitement is gone.