I'm glad that you've seen the GP and that you are getting checked out physically. It's best to rule any physical problems out before taking on the MH minefield.
Maybe separation could work better for you both and give you some space to have a think about what you both want? You did seem very unhappy with how things were and how you were treated.
Let us know how you are doing, won't you? I think you have made a very positive move in getting things moving re tests and MH support. Use the Samaritans if you find they help and are kind. Even if they can't solve the things you want solving..There are still decent compassionate people out there who will always listen to you and alleviate some of the mental burden. Take care, Buster:hugs: