Hi Cory! Welcome to Maintainers! I read your story on the Introductions thread and big congratulations for your weight loss and maintenance, especially through a pregnancy. That's quite a feat!
I don't have any experience at all with IUDs, so can't help you there - sorry. The 'no time to workout' problem is a lot more common, though - I remember how hard it is to find time for a shower when you have little ones, let alone exercise.
The only suggestions I have are to exercise at home (I don't know if you were going to a gym or not) and use weekends and times that your DH is home and can watch the kids for a little 'me' time.
But as you point out, you're not far off from your comfortable maintenance range, so good for you for not letting things get out of control.