Had the Oxford AZ two weeks ago at oak house in bramley (back of morrisons) at 9am, by 6pm I had a splitting headache, chills, aching joints and muscles which lasted around 36 hours then I was ok.
Mrs G had jab at 9am yesterday, 12 hours later got the symptoms you describe. This morning though she was fine.
Mind you she had already had full blown covid that knocked her out for 10 days and another month after that before she felt ‘normal”