When you say flu jab do you mean shot case at my job it's required that we take the shot and you know sometimes you can get sick from it so if your sick already I wouldn't cause yesterday after getting this is my 1st year I had any symptoms yesterday I have already taken it 2 years before and nothing and since we can't take anything I'd wait until the cold went away 1st
Not sure if it would be the same in England, but unfortunately my doctor told me to stay away from any medications besides Tylenol. I would just try to orange juice, chicken noodle soup, and plenty of rest route. Hope you start feeling better!