I think my 3 day old has bad gas that's making him upset, what can I do for him?

I give my daughter has drops and rub her belly after it has always seemed to help

Gripe water (: but id ask ur pediatrician first.

I read something that said to pull their left elbow to their right knee and then do the same with right elbow to left knee. and alternate doing that until they stop farting

I bend and straighten my little one while on her back

There's is always gas drops too. those help well.