Pcos false positive?

Nadia

I have pcos and I have been ttc for 4 years with no luck.

I have irregular periods but since January I started my period without medications. March was the last month that I got my period.

I took a pregnancy test May 18 came back positive.

But just to be sure I took 3 more May 19 and they all came back negative. :(

Was it a miscarriage? Or just a false positive that got my hopes way up high??