Hi welcome to the forum.
I had my jab last Wednesday & my arm felt like my brother had given me the birthday bumps backdated 35 years lol
Your symptoms are not unusual, it’s a sign that the vaccine is working but they do usually only last 48hrs.
I don’t know anyone that has had the second dose yet, they only just started those in my area, but it makes sense for the second one to be a bit worse. The first dose is to get your body to recognise the spike proteins of the virus & provoke an immune response. When the second dose is given your body knows by now what to do & provides a swift response. I’d imagine any side effects are felt stronger but resolve quicker.