Sometimes when i wake up suddenly during the night when i try to go back to bed i feel as if i am shaking. is this normal or something serious?

Depends on cause: I would mention it to your physician, also make sure that there is no concern for diabetes as sometimes we can have fluctuating blood sugars and shaking is one of the symptoms. Sometimes it may also be related to something we dreamed. Record a diary and write down exactly what you feel or remember during these episodes as we have learned that if we listen, the patient will tell us the diagnosis.