I had my flu and covid booster a few weeks back, I was in bed most of the following day and felt a bit off for about 3 days, then I was OK.
For some reason I have felt bad after the last 3 Pfizer covid boosters, I had nothing more than a sore arm with the original two Astrazeneca ones.
My first Pfizer covid booster put me in bed for 3 days, I couldn't even manage to get downstairs for a cup of tea so had a few sips of cold water when I needed to use the bathroom. By day 4 I was able to go downstairs for a cup of tea and I was able to make something to eat on day 5. I was more or less OK after about 8 days.
I have no option, other than to keep taking the boosters, due to having emphysema.
I was told that people who have such bad reactions to the vaccines means that they are going to be very well protected from the disease, so maybe that's true as so far I have never had covid, so I will have to keep taking whatever I am offered but I hope that I will be able to get a non Pfizer one next time I am due
I read recently that Moderna are supposedly getting a combined flu and covid vaccine ready for next year, so that we will only need one shot, instead of two individual ones. Hopefully they will soon find a way to do like they do with the kids and make one we can just sniff up the nose instead of needing to inject us.