I don’t know how to help my partner effectively

My partner has been dealing with BDD for a while now, however from the last month up until now it has gotten progressively worse, they’ve been crying about it often, spending hundreds on products, yesterday they called me in the middle of the night crying and desperate to feel better.

I’ve always tried being supportive and reassuring, helping them find possible solutions to issues and just being there for them. But I don’t know what to do, how to actually help.

They’re trying to get a dermatologist for the main issue they have and we’ve been trying to find a psychologist but it’s been borderline impossible and so expensive to do so. I’m not a trained professional in any way, I just want my partner to feel ok with themselves and stop the suffering that they so strongly feel.