Susan, Oh yeah! Same thing happened to me. Child 1 - gained weight and had a terrible time getting it off. Finally did. Then came DS2. Repeat. The problem the second time - it took me 22 years to get around to losing those extra baby lbs. (and the additional 30 I added to them).
You CAN do this. Start slowly, and just keep at it. As you learn what works, keep doing it. If something doesn't - modify it or replace it with something that does.
A few things that work for me.
1. Calorie counting - no forbidden foods.
2. Journal - write everything down - hold yourself accountable for EVERYTHING you eat
3. Plan ahead - planning and followingyour plan can't be stressed enough - it is ESSENTIAL to success.
4. Small meals - I eat 6 small meals every day. They keep me on track and when I see something I just gotta have, I can usually quell the temptation by reminding myself that I have a snack or meal planned in just a little while. This keeps the blood sugar level which keeps me from carb binging as well.
5. Exercise -this was actually a 4 letter word in my vocabulary when I started. I despised, loathed, HATED it! But, I kept trying things and finding things that I didn't hate (I won't say love, because I don't). Now it has become a regular part of my day. I plan for it and do it. I allow myself choices - WHAT will I do today (cardio, yoga, dance, pilates, walk, weights, resistance bands, bike, ball) but I don't give myself the option to skip it.
6. Come back often - the support I receive from 3FC is a huge part of my success. The folk here are encouraging and wise

7. Daily devotions and prayer. I couldn't succeed without them!
You CAN do this

Keep us posted on how you are doing. Take it one step at a time, and before long, you will be amazed at how well you are doing