I spoke to a geneticist, an acquaintance on Facebook.
He said that based on my genome I should see a derm asap and should be monitored regularly. He said it's not that I definitely have or will get melanoma but the combination of rare mutations in my genome make it much more likely than average. This is the advice he gives to women with certain BRCA mutations too.
I feel ok because I already knew this really. And I'm seeing the derm in one week now. I'm also seeing the optician on Friday to check the mole on my retina (this is what scares me most). I have a few on my irises too.
I felt ok today anyway and I went to a barbecue at my godfather's house. I'm also looking to move back to my hometown and I'm looking at houses for sale.
What I am hoping is that I haven't left it too late and that I don't already have melanoma. I've never really looked at most of my moles before so I really wouldn't know if any had changed or new ones had grown. But hopefully it's fine. Then, going forward, I can just monitor closely for any changes and get anything worrying cut out straight away.
My main fear is getting melanoma in an inaccessible place, but I'm trying not to think about it.