Achy!!!

 Since Tuesday, my whole body has been aching. I don't have any other symptoms like fever, cough, or anything but my arms and legs are aching and it keeps moving from my arms and legs. It feels like I got hit by a bus. Like I've been exercising or doing something very strange is and I have not. I'm gonna call the doctor Monday but I'm really scared that it's MS or ALS or something serious that's coming up on me.  I have a balance problems over the past year or so, but all my doctors have said anxiety since I did see a couple specialist. But why is my whole body aching?? Would also like to mention that they're cracking a lot and when I sit in a certain way they go now I'm a little bit and start tingling. No I'm not pregnant and I had bloodwork two months ago that was normal.