i have been diagnosed with anxiety and i get these feelings aswell they are some quite common symptoms i wouldnt worry about it try to realx but if you are worried go and see someone for reasurance.
I have gotten those strange sensations, the static through your head, its loud and short like a jolt and is very frightening. I have gone to the doctors for anxiety and described that feeling and they looked at me like i didnt make sense. If you dont have insurance, there are natural remedies that can help sooth your body such as St. Johns Wort, kava Kava, Velarian Root, Omega 3 with high DHA, and passion flower extract. I have been using Omega 3 because I cant take meds and it has helped a bit. Good luck.
you really are best seeing a doctor to rule out anything, everyone gets awoken by jolting in the sleep now and then, its the brain checking everythings in working order, you could of even been dreaming and tripped over