Has anyone had a mild flu shot reaction? I got my flu shot yesterday & have felt like complete crap all night & all day today. I partially assumed it is because I'm almost 39 weeks pregnant & partially because I've always heard you can get some of the flu symptoms after receiving the shot. However, I just noticed this on my arm in the exact sight of where I received my shot yesterday. It's like a big hive that isn't itchy. Does this mean it won't be affective for my baby or me? I wonder what in it that I've had a reaction too. I've never reacted before but I also haven't had a glue shot in 5 years.