your boys are still young enough that you can certainly leave it for a bit longer on whether to have more or not! it will also give you the chance to sit down and speak it out with your DH on whether to or not go ahead with another one.

my DH and I are going thru that same situation at the moment except we only have one child atm! i had such a difficult and horrible pregnancy that i just dont know if i could ever go thru that all again. plus we are so happy with just DS that we dont know if we really want another one. sometimes i long to go again but then i remember all i went thru before and i just hesitate and get anxious. i am sure you will know if and when the time is right to either complete your family or know your family is complete

good luck with whatever you choose!