Testing question

I tested opk on 11/3 on a clear blue digital and got an empty circle. I yhen tested the next morning and got a stool smiley which means peak. I also used a cheapie pink dye test and it confirned it with a darker line than the test line.

Later that night the I took another test and the line got lighter. Is that possible to happen so soon ??

My doctor said i might have pcos but didn't really look for it just said it looks like that I'm worried about a false positive.

We BD that day and the next day I had terrible pain in my ovary on the left side.

I'm better today just a lot of cramping since then.

Need help figuring this out. I had a miscarriage last year and have been eager to try. This is our second month trying as we just got married last month.