I got mine last Friday, felt really tired and fluey the next day then was fine. Sitting at home 2 nights ago and had a sudden onset of burning in the elbow of my injection arm, it felt like my arm had been put in the fire and it was bright red!! Called the GP and was told I have "covid arm" and is quite normal and they had been getting a lot of calls about it. It is your immune system going into overdrive, and quite harmless, cold compress and paracetamol and it had gone within a few hours.
I've always thought that SP should be classed in the priority groups, a lot of workers have had to work through the pandemic as this is their only means of income and survival, i even think we should be given lateral flow kits like employers are being given.