Cyst caused cycle cancellation

I had my baseline today for my 3rd ER after priming with birth control, and there was a 20 mm cyst producing estradiol (252 pg/ml). I’ve been through 2 cancelled cycles due to a dominant follicle before, but never had a cycle cancelled at baseline 😢

Has anyone else been through this? How long will it take for the cyst to go away? Any info appreciated, thank you!