Palpitations that wake you from sleep could be an indication of an irregular heart rhythm, it may be normal for you but you need to have your doctor make that call. Neck pain
, abdominal pain
, cold extremities from circulation issues, fatigue can all be cardiac as well, different medications can cause issues.
You didn't mention if your doctor was aware of all of your symptoms. Too much caffeine can cause heart palpitations and stress and diet can have a huge effect on the body.