Shots today....what to expect?

Kendra • Just had my twin girls on June 10th
The girls are finally big enough to get their shots and we go at 2 today. I've heard some babies get a fever and are cranky while others sleep a lot after. I have a feeling I'm going to have one of each lol but I'm just wondering if there's other things I should expect. We have been having a rather difficult time with Parker lately and being fussy for no reason all day and night I think it's her reflux bothering her and will address it with the dr today but any advice would be greatly appreciated!!