I recently had a number of immunisation injections (for Hep B, Measles, Chicken Pocks, Rubela and Tetanus), it is most likely coincidal, but since then I have had the following symtoms: headaches, mild nausea (queezines), gastric reflux and diahorrea. I treated the gastric reflux with over the counter medication. I took headache tablets for the headaches. The diahorrea will pass. What I am concerned about is the persistence and nature of the headaches. They seem to have the same symptoms as a middle ear infection I had years ago. Anyway that's my symptoms. What is the most likely diagnosis?