How to improve sexual life with my 33M anxious and stressed girlfriend 31F of 3 years after she experienced some physical injury?

I suffer from performance anxiety and my gf is a strong anxious over-thinker and unfortunately has been stressed for over a year by life happenings unrelated to us.

We have been long distance for 2 years (seeing each other many times per year) but the relationship is really solid and from the summer we will be back together.

Sex has never been easy, I was coming from a rough patch and anxious and she had some limitations that made it more difficult for me and her anxiety fed mine.

It took me a while to get into a better shape but when I was then long distance and her external issues that causes her a lot of stress started, thus complicating things to have reliable frequent sex.

I don’t remember what happened first, but she started to be less wet (when we met the first months she was very wet) and experience discomfort with penetration, even with finger (the area around it is sensitive). (She didn’t want to try lube) then one time during sex (not rough) a movement lead to her strong muscle pain the next day (it wasn’t the movement itself, was just a trigger or another issue now solved)

Since then we have had sex but very rarely and she hasn’t been much in the mood.

She struggles to focus on the pleasure (afaik she barely masturbate herself) and even if I go down on her, it feels like after a while she doesn’t allow herself to enjoy it (I think she’s afraid of squirting as well)

She wants to have sexual life again and she’s proactive but long distance has complicated everything and I need advice on how to restart things in the best way possible and understand her more. what can I do?