What can I give a 3 week old for gassyness?

Molls

My boy is exclusively breastfed. Some nights I can tell he’s uncomfortable trying to sleep. Constantly grunting and farting and fussing. Sometimes spitting up a little. He doesn’t seem sensitive to anything in particular that I eat. But some nights now and then are tough for him to sleep. I’ve heard of different kinds of gas drops or gripe water. What works for your babies?