We are almost the same age. It's good that you live with your sons. It is harder when there's no one about, and they can support you if you feel ill.
The self isolation is very common. Planning out and hiding the drinking kind of takes over our lives. Now that you are turning your focus elsewhere you need other things to do. I strongly suggest you find the closest AA meeting and screw up your courage to go. You can just sit in the back and listen if you like, but I would encourage you to share a bit about where you are. The people will just be normal people. My first AA group seemed to have a lot of lawyers for some reason, but there will be teachers, SAHM's, etc. Just normal folk. They have all been through what you are going through.
Ring your GP on Monday and see when you can get in. It's not urgent but it's important. I'm an RN. Medical people don't personalize it. It's a disease and not at all shameful. They will respect you for seeking help and being honest about it. So many die because they did not ask for help.
Certainly the last 3 it's increased and the last year where if I go out, I can't wait to get home to have a drink - oh God - I've said it
That's perfectly normal. It's a progressive disease that gets worse over time. See the article I linked to up thread on the molecular basis of alcoholism. Your brain adapted to alcohol and isn't quite right without it. That's why you crave it.
Please let me know if there's anything else I can discuss with you.