going from 3 to 4 kids. . . .

fa

so my husband and I have 3 kids ( 6, 2, and 8 months) I will be 34 next month and he is 40. I feel like we are " playing with fire", I refuse to get my tubes tied or any sort of insertable birth control and the last several pills I've tried have had bad side effects. He claims to be ok with getting a vasectomy but has not made any attempt to go along with the process, he also Won t use condoms and pulls out ( we just started having sex after a 6 month dry spell- baby, cosleeping, ppd) so ofcourse I feel like we are just asking for it to happen again. for those mom's with 3, what was it like to go from 3 littles to 4?