Perfectly normal for a few days. My worst reaction to a 'flu jab was the other year when they got the variant wrong and I had to go to bed with a temperature - then, of course, I got the 'flu, which led to bronchitis. I've just had 'flu jab in left arm and pneumonia jab in right arm. The latter was painful for a few days (had it Tuesday) but is OK now.
Believe me, Sharon, if you are over 50 you would not prefer the 'flu. Bird 'flu is, from experience, really nasty It lasts for over 6 weeks. We caught it in Paris around August 20th 2009 (probably in the Metro) : even after the worst was over (and the worst was bad) it took several weeks to recover and I'm not sure that even now it has quite gone - this is over 5 yrs. later. Real 'flu knocks you for six and can kill you.
My strong recommendation is that you arrange a 'flu jab and prepare for a little discomfort for a few days.
I have had real flu twice in my life. Once as a healthy and active teenager and then again in my late 30’s, again, very fit healthy and active. Both times it was memorably dreadful. The first time I had the most awful dreams and bizarre beliefs and the second time I can remember crawling from my bed to the loo and back because I couldn’t stand, let alone walk.
I knew a lady who died from the flu - on Christmas Day! I always have the jab and have had no reaction except for a slight tenderness where the injection went in, just for a couple of days.
Following on from my last comment - I had a smallpox vaccination in 1962 and had a really severe reaction to it, swollen glands under my arm, it was awful. I was told that had I caught smallpox, I would have probably not survived it, so the stronger the reaction, the more susceptible to the actual illness you might be. Don't know if that's true or not.