Struggling

I'm struggling! I'm having a really hard time getting workouts in. My daily schedule is just nuts right now. I've had to miss walking twice this week due to grocery shopping. This morning I woke up and got out of the house right thing in the morning so that I could get my walk in. I knew if I didn't I wouldn't get my walk in today. I've really got to save up for a treadmill.
The gym I belong to has odd childcare hours and I also can't bring the kids I watch there. So during the days I watch kids I'm pretty much stuck here. Can't go walking because I don't have a big enough stroller. I have a double. I need at least 3 seats. I'm thinking I might have to work something out once school starts.
Even having gotten my walk in today I still want to do a DVD. I don't think my just walking a mile (or a little over) is going to be enough here in the near future to lose the weight I want to lose. I'm going to have to crank it up. I really want to do the couch to 5k program but can't do the running in the shoes I have right now. Gotta wait til next month to get me some running shoes. Regardless my favorite tennis shoes have done their duty and should be put to rest!
I'm really trying not to stress too much about the lack of workout sessions I have gotten in. I'm losing weight, just not as quickly as I would like. I know it takes time. It goes on fast, but sure doesn't come off very fast.
I figure once school starts I'll be able to set up a much better workout schedule, but for now I'd like to have some sort of idea of things to do.