- I learned a long time ago that worry only makes things that much harder - it prevents me from seeing clearly and making good decisions. You were very stressed when you sold your house and made a decision you wish you hadn't. You're very stressed now and it's very hard to make good decisions when we're stressed.
I don't think you can see your options clearly - e.g., you have money to buy a house - that's HUGE! Yes, it's not easy finding the house you want, but it's not easy for anyone. But at least you have the most important thing, which is money to buy one. I guess I'd like to urge you to focus on what you do have and what you can do, and not on what you can't do, which just wastes energy.
I think it would be helpful to calm down. I know, easier said than done - but there are ways to do it - meditation, relaxation tapes, breathing exercises (e.g., see Box (4-sided) breathing: activate parasympathetic NS, lower BP, help with sleep | Phoenix Rising ME/CFS Forums
I remember when I first meditated. I was astonished to find out that it was possible to stop thinking. I literally never had done that before - my brain was always going, and I thought that was the way we were supposed to be. And it was so soothing to calm my brain, at least for a little while. I can't recommend it enough.
Also, have you ever tried inositol? It's generally considered one of the B vitamins though it's not a vitamin. It can be very helpful with stress: 5 Evidence-Based Health Benefits of Inositol (healthline.com)
It helped me with sleep when I first took it. One of my sisters used to be constantly stressed about her job - I recommended she try inositol and it calmed her down almost immediately. She liked it so much she recommended to a friend where she worked who was similarly stressed. I think she was taking 2 a day of these: Now Foods, Inositol Capsules, 500 mg, 100 Veg Capsules - iHerb
I think you may be in a better position than you think you are -