Getting pregnant with PCOS

I have a friend who has pcos that has been trying to get pregnant for a few months now (with fertility medicine) she got a positive pregnancy test on sept 8th but her hcg levels are not rising appropriately they are not doubling and currently are only at 441 there are concerns of miscarriage and mainly an ectopic pregnancy because she is having a lot of pain but she’s looking for a little bit of hope, has anyone had low levels that aren’t rising and made it through with a viable pregnancy, or been in a similar situation and had a normal pregnancy after an ectopic pregnancy