Emma, I hope that things work out for you and your girlfriend. Please communicate with her that you are having issues and please tell her that you are trying to be patient with her and that you think that she is trying to do the same with you. Also I would, if you are able to look at getting some new hearing aids; I know they are expensive, but hearing is part of communication. I have a slight hearing loss myself and often require reading lips to hear everything.
You look like you have a lot to offer and your partner sounds like she is there for you, so push through. Maybe you can learn some sign together, deepen your relationship.