Cyst in ovary

I am currently 8wks pregnant. I had been having pelvic pain for a few wks so went in 3 wks ago for a Transvaginal Ultrasound everything with baby was good but they noticed a cyst in my ovary that was 4cm. Fast forward to 2 days ago I got a TV US done again and baby is fine but Cyst is now 6cm. I have to go back in 2 wks but she's concerned if it grew that it will affect the baby's growth. Has anyone had this before? if it did grow what is the next step. (Circle by my thumb is the ovary)