Sleep regression at 2.5 months??

Baby just started waking up every one-two hours at night! He used to only wake up once.

We just put a binky on him and calm him down and he goes back to sleep, because even when we feed him he ends up eating a small amount, adding up to the total he would have ate if he only ate at 4am and 7am. That’s why I don’t think it’s a growth spurt.

Anyone else had the issue at this age?? What should I do?

There are a couple of variables also, we are visiting my parents at the moments so he gets a bit more stimulation during the day. Also we stopped swaddling him two days ago, but now I started swaddling him again thinking it might fix it but it’s not ...