Hi Beth, Wow what a road your travelling. May I ask what kind of vaccine you had. I am thinking back and I remember I was going through hepatitis vaccinations when this stared. I don't remember the time frame, but I need 3 shots over a period of time and remember my arm hurting bad for at least a week. Like some one punched me really hard. I phoned the pharmacist and he told me to ice it. Just thinking out loud.