Hey, im sorry for your frustrations. Having irregular periods and ttc is extremely hard to deal with, unfortunately you have no choice but to wait.
I have pcos and my cycles range from 3 to 4 months, which basically took my sanity from me( all I could do was think ttc, how to fix the problems, I dreamt about babies, researched like crazy, and cried..ALOT)
I know losing weight can help shorten your cycles, and I also know that eating organic, non processed foods (paleo) can help dramatically as well. maybe try these things and see what happens.
Are you just seeing your family doctor, who said everything is alright? Because my family doctor told me I did not have PCOS (I knew I did though) and went to a gynae for fertility, he told me immediately that I had it. Maybe seek a Gynae or fertility specialist for help, I know they want you to wait at least a year to try before going in but a Gynae will see you right away due to irregular periods!
TTC for 2 years 10 months