Unintentional weight loss

Hi everyone, I hope you're well!

I'm really struggling as I keep losing weight, due to pain I find that I have absolutely no appetite. It also doesn't help that I have contamination OCD so I find it really difficult to find "safe" foods.

Do any of you have any suggestions on simple foods I can eat to gain weight? Or just how to increase my appetite? I'm really worried as I'm now underweight and I can't seem to stop losing it :(

Thank you in advance 🧡