I was trying to get sleep & randomly felt a twitch from my upper back to upper part of my arms which woke me up..is that common to get twitches before going to sleep?

Usually normal: Yes, happens often as you pass through stages of sleep, and is normal. Tho usually it's the sleep partner who complains; the sleeper stays asleep, but sometimes it does wakes them. Reading my toddler to sleep, when she twitches, I know she's out and I can go back to my reality show.

Twitches: Would see if it is one time event or a repeated event. Would check electrolytes potassium magnesium sodium calcium, sometimes may be irritation of nerve from position ( like a trigger point irritation), pillow position, if is constant would f/u with doc though rare young people can have disc disease or even more rarely MS.