First of all, you aren't "stuck" unless you've cemented your feet to the floor. You're free to get outdoors, take your babies for a leisurely walk, enjoy the fresh air and possibly talk with some adult neighbors.
Do whatever possible to synchronize the children's nap time together & you take a nap in the same room or close by. Catching a little sleep can do wonders for our frame of mind.
Try to make small changes in your routine if it seems too mechanical & boring to you. Arrange to have a friend & her child visit for an hour or two.
And while you're visiting, suggest the idea of exchanging favors with this Mom. If the 2 of you can supervise each other's kids while one of you goes shopping, or out to lunch or to see a movie, that can be just the break you both need, maybe every 2 weeks or so.
Good luck. You don't realize this yet, but your babies will grow up and leave home so quickly, looking back will astound you! I sincerely wish you & your family much happiness.