Basically just that.
Had AZ in March, was ill with pretty nasty flu like symptoms, couldn't get up, shaking, temperature, in a terrible state. Had 2nd AZ and was ill again, but not as severely.
I'm about to have a booster, which will be Moderna and I'm worried!
I also had covid in October and I was again, really quite ill. Struggled to stand up, sleeping 6+ hours in the daytime, mega headache etc.