it can be a side effects of anxiety, but look at other options first, have a physical done, incldueing a complete bloodtest and checking your bood pressure

im sure your docter can determine whetehr its anxiety or something else
i feel sick whenever i sleepfor more than 9 hours, so that could be part of the problem, those symptoms just match so many prolems that its impossible to tell, if nothing else is wrong.. all i can say is see a docter.