My right arm and right leg feels shaky and really weak, my muscles are twitching too. I can walk about and do stuff still but definitely can feel the weakness in them. Can lack of sleep and anxiety/stress do that to you? i know it can effect all muscles or certain muscles at one time. When i stand on my right leg i feel my leg shaking and when i try make a grip with my right fist i can feel the weakness in it. My left side feels fine though maybe a little tired but that’s it. Last 6 weeks has been very stressful and i have been very anxious too. I suffer with health anxiety so that doesn’t help things either.