have you tried a baby carrier, like HAB of baby bjorn.. Eden is nearly 17 weeks, i tried the pram and she never liked it, very bored and made me extremly anxious about going out... now i alternate between the hab and baby bjorn, depending on whether she is gonna fall asleep or not. I dont have another bub but i walk my two puppies twice a day with the baby carrier, makes the world an easier place, I havent used the pram for about 2/3 months...
Perhaps this is worth a shot, before i was like you. I felt house bound and dreaded going out. Now im not sure i could put Eden in the pram, it would feel odd- but thats me and thats another story.
I hope u work out some plan so you can wander around with both your bubbas. let us know how u go with it.
xoox