I am a federal civilian employee. My job has become extremely stressful. Does anyone know if there's any way I could try to get placed in a less stressful situation?

I mean, I probably don't qualify for retirement disability, and I have been working full time, but it's sure taking its toll. I'm just barely hanging on

I use my sick leave being sick. I use my annual leave trying to catch up on the things I should be doing on Saturdays but I can't because I need that day to rest--both from my methotrexate shot on Friday, and just cuz I need to rest

Any advice would be appreciated. Thanks!