Got my booster on Tuesday afternoon... Moderna this time (first 2 were AZ).
I did not have a good day yesterday though - woke up at 4am with a really sore arm, and when I went to take some paracetamol, I started feeling nauseous. Managed to get back to sleep until 7:30am, but when I woke again, I had a splitting headache and the nausea was back. Spent the entire day lying in bed with a pounding head and occasionally vomiting. Of course, it didn't help that I've had a cold for the last week (I took a PCR test on Monday to make sure it wasn't Covid), which probably made the booster side-effects worse.
Feeling a fair bit better today - the nausea has gone, but I still have a slight headache on one side of my head, and am feeling a bit dizzy/lightheaded... but I did manage to actually get out of bed, eat some toast, take a shower and get dressed, which is a vast improvement on yesterday.