I wake up with a rapid heart beat sometimes and throw up about 3 times a month after u wake up that way. my feet hurt all the time at work whatisthis?

Event monitor: Ask your doctor to prescribe an event recorder which is a monitor that records your heart rhythm and beats at the time these events occur, he may advise you 30 days monitor and based on his / her finding , your doctor will guide you on the right Therapy

Not normal: It would help to know your age, however, if you do not suffer from anxiety or panic attacks, you may need a cardiac workup from your doctor or a cardiologist including EKG, tress test and/or Holter monitor and echocardiogram. If you are standing most of the time, you could be suffering from plantar fasciitis. I think a visit to your doctor for both soon would be helpful.