Trish :hugs:

Bonnie was a bit the same with attachment.

A couple of tips (sorry if its repeating anything the girls have already mentioned I haven't had time to read through their whole post )
Make sure you are pushing the top of her back in really tight... this will force her to pull her head back and therefore her mouth will open wider.
Before you put her on, tease the heck out of her with your nipple to make sure she opens as wide as possible.

As well as checking her tongue check the roof of her mouth to make sure there is no issues for attachment there.

Bonnie still is a noisy feeder but that seems to be the way she feeds. Thing is she has been my worst feeder and my nipples never got sore... weird!!

Good luck my dear

xx