I can only imagine how hard that must be... I wish you well with your pregnancy though.
Maybe if you feel guilty about feeding your toddler those meals all of the time, you could make a lasagna or something large on a Sunday that will last at least for a few days so you won't have to make meals. Then supplement with the Gerber meals.
Or if you have the time and energy (that's obviously the key here) you could also try spending a few hours at Let's Dish (or the equivalent). You'll have to look up if there's one in your area. Essentially you prepare food in advance there and then just cook it up at home when you need it. It's a great outing with girlfriends too so you'd kill two birds with one stone (seeing girlfriends, getting meals for home made).
I made these suggestions because as one other posted said, two kids are going to keep you really busy so I'm thinking long-term ideas here.
Good luck!
ps> don't know if those meals are healthy or not by the way...