Uterus Too Thick to Start IVF Cycle

I went in Monday for my baseline and my uterus was at a 7. My period started that afternoon and they had me come back today and my uterus was at a 9. The nurse has no idea why as my hormones dropped as expected. They also said they found a large cyst on my left ovary. They canceled my cycle and told me that they will have to talk to the doctor to see if need to do anything about the cyst. They said there is nothing they can do if my lining doesn’t thin out next month. The max they will work with is a 6 but they prefer a 3-4.

Has anyone else ran into this? Any meds or tricks that worked for you?