won't sleep in crib

Kayla
Does anyone have any advice on how to get my 6 month old baby girl to sleep in her crib? She used to do it every night but when she was sick the doctor said to have her sleep in the rock n play to keep her elavated and now she won't sleep anywhere but the rock n play and I'm worried because she's about to out grow it. I've tried everything, I've gotten several things that lights up, plays music, a projector on the wall. Also I'm not a fan of letting her self soothe but I've let her cry and all that does is get her more worked up. I'm so lost as to what else I can do, any advice would be wonderful, thank you in advance.