Wrongly diagnosed?

Just wondering what people’s symptoms are.

I went to the doctors due to irregular cycles for a year (83 days, 56 days etc) after coming off the pill. No other symptoms. Diagnosed with PCOS - had an ultrasound so guessing that must have shown something. But my bloods were normal.

My cycle has been 28 days for 3 cycles now (🤞).

Could I have been misdiagnosed even with an ultrasound?