is it serious or am i just worn out?

I’ve been very busy lately with work, and there are times when my body feels tingly, I’m eating normally and going to the restroom normally, I drink alot of water so I’m sweating quite a bit, I do feel tired alot but I’m a restless sleeper, there are times when I do feel anxious or have anxiety especially in the mornings but goes away by mid-morning, and lately my left shoulder and arm feels like there are little muscle spasms. and another …