PCOS - is it possible?

I’ve had a few (maybe 2-3?) ultrasounds on my ovaries in the past and nothing has ever shown up, all was normal.

I’ve had two kids, 1 in 2017 and 1 in 2019 (both on first try). I’m now trying for our 3rd (but forth pregnancy - miscarriage in November last year). In total, we’ve tried for 7 months (Almost 4 months since miscarriage).

Is it possible I could have PCOS even though nothing showed a while ago? Note: have an u/s 1st March.

I’m having symptom, but also symptoms I remember having before.