Feeling shakey?

I'm 37.5 weeks, lately I've been having episodes of feeling very shakey and uneasy for a few minutes at a time throughout the day.. I also have some unpleasant symptoms like frequent bowel movements, light headedness, vomiting, extreme cramps in my arms and legs, but no fever or headaches ect. And I drink almost too much water so I know I'm not dehydrated. Has anyone else had this or something similar? My doctors just seem to keep passing me off and telling me "it's just pregnancy" but finally sent me for blood work yesterday however I wont get results until next week.