Help! Large ovarian cyst while preggo

Long story short, I’ve had an 8cm cyst on an ovary since 8wks. By 13wks, it hadn’t grown or changed but my OB is still monitoring it closely. She said it doesn’t have walls or anything concerning, she doesn’t think it’s cancer but she wants to watch it. Well for someone like me who has extreme anxiety, even mentioning the C word has caused me to go into panic mode. Has anyone experienced anything similar? Idk if it matters, but this pregnancy comes roughly 3 months after my daughter was born so def back to back babes. Cyst wasn’t present during that pregnancy. Looking for comfort...