DB - hun.. use those photos as your motivation, don't look at them as a bad thing, look at them and think this is why i want to change.
I use my gross photos on FB and i look at them and they make me feel sick, i SHAMED myself and now i know i WANT to make it all work.
You CAN do this and we are 100% behind you, when DS wont settle grab out the pram, attach some toys and go for a walk.. your getting your exercise and kids are being entertained.

Keep up the great work hun