You don't have to undermine yourself and the weight you've put on due to motherhood or a stressful life... Yes, physical fitness is necessary and a good thing to keep yourself healthy, but is that the only factor that defines you as a person? I don't think so. You need to tell yourself that you've made a number of sacrifices already, and this is just one of them. Life always rewards us in one way or another for all the sacrifices we make - for our loved ones, family, friends, etc. You should be a proud mother for excelling in the role of parenthood everyday.

As far as physical fitness is concerned, you just need to take some time out and that is it. Try to start with those light exercises that you can easily do at home. Look for some clips on YouTube, you'll find plenty of stuff over there. Then try with brisk walk, jog after a while.. Try to download those apps that help you to keep a track of your exercise and how you can take that graph in an upward direction gradually. Then you can even start with regular cardio and all.

So yes, it isn't over yet.. Tell yourself this. Whatever you've done so far was amazing, whatever you missed on was part of the script - and whatever there is you can still do depends entirely on you. Period!