Had my Oxford AZ jab two weeks ago. More headaches than usual and felt a bit knackered, but arm not sore at all. I've also had friends reporting Pizer jab gives bad headache after 10 days, but fine a day or so after that.
I've heard a few people reporting these symptoms , including a couple that went to bed at 8pm on day 2 feeling really rough, but woke at 10:00 the next morning feeling ok.