Tips for hip and lower back pain?

So I(19f) was diagnosed last summer with heds and this summer I've been working at a garden center outside most days and I love the job but my lower back and hips have been killing me. I have a few exercises given from when I was diagnosed but it doesn't do a whole lot for me when I can barely bring myself to do them every day bc it hurts too much to even do them sometimes. I'm just searching for any tips or tricks to help with the pain and also if there's anything to help deal with the heat since it's getting really hot where I live. If the pain doesn't take me out, the heat certainly will 😭. Thank u!!