Looking for Motivation Friends...

Hey there,
I'm hoping to gain the extra motivation I have been lacking lately.
I have been on and off trying to get back on track. I got pregnant and had my baby August 2015. I gained 50lbs with him against my efforts not to gain anything. I was well on my way before I found out I was pregnant. Since having him I have struggled; at first it was my back, it hurt to walk and simply carry my ever growing baby. Now, I just don't know how to keep going almost, which is awful at nearly 100lbs to lose to be deemed healthy weight. He is 15 months old, and I know I have to do this not only for myself by for him as well. He still doesn't sleep (literally meaning he wakes up every 2 hours in the middle of the night) I'm always exhausted which I know overall wont help. But I'm not trying to make excuses, I know 80% is food and I want to focus on that and do my best to workout every evening. Anyway, if you read til the end I'm simply looking for any other fellow mama's or otherwise to take this journey with me.