Burping?

Sophia
Ok.. so sometimes I can sit for minutes and my son just will not burp after eating.. and then other times he burps a lot.. then there are times that he won't burp until like an hour later. I hate when he falls asleep and hasn't burped. I get paranoid that he will spit up in his sleep and I won't hear him (at night). Does this happen with any of your babies?