High LH in bloods

Lee • PCOS fighter. 1DD 18/07/17

My doctor says I may have pcos so I've had blood tests and a scan. I've only had the results of 1 set of bloods so far which showed Gilbert's syndrome and high LH Level. So that indicates a problem with ovulation I believe. Is there anything else, other than pcos a high LH reading could be caused by?

I came off the pill in April and about 2-3 weeks later I had a positive ovulation test, we tried and failed, could it have been a false reading?