Please don't worry too much, the only reason mine was left to grow to that size was because I was prg again at the time and they didn't want to do surgery till 20+ weeks (if at all). We ended up losing our baby at 12 wks and I had the surgery about a month later. I think it was around 4cm when they first found it??

I hate telling people my experience but I always think it's better to get checked out because mine did such a lot of damage, it's just not worth the risk. I hope I haven't scared you!

Good on you for getting it checked out, here's hoping you get the all clear! Let us know how you go