Should i have switched arms?

im in the process of getting my rabies shots, as i will be traveling this summer. i got my first out of three last week on my left arm, and the days after, all the joints in my body hurt, but moreso on the left side. today i got my shot on the left side again. will i undergo the same amount of pain on both sides this time, or will there be evn more pain on my left side, or will i feel less pain in general because im already partially immune? last time, i took 2 tylenol every 4–6 hours while awake, and it helped to the point where there was still a lot of pain all over my body, distributed evenly. should i switch to my right arm for the third one, on the 25th of june. i have an exam 3 days after that day, and i cannot change the day of the shot because then it wouldnt work, and i cant change the day of the test because i will be in africa right after, and studying before.