Hmm close to 110 lbs at 5'6". According to the weight chart table you are underweight. I would suggest light excercises. But your question is about a "funny tummy" or abdominal area. What are you refering to exactly? What is it that you want to target or tone?
Give it three more months before you think about excercising your stomach aggressively. Your body has gone through some drastic changes. The funny tummy is due to the labor and nothing more. You can start off by working out lightly with a swiss or medicine ball, there are many ab excercises available on the web without having to invest in videos or gadgets.
Or you could cheat and buy those huge concrete corset underwear things to hold it all in, they do work if you're only wearing them for short periods and as long as you don't try and bend over cos you'll cut yourself in half!
You could do many exercises at home. There is a tummy trainer, that you could buy 'Ab Shaper Basic' Its basically, you lie on your back and move only your upper part of the body slightly, with your arms crossed on your chest. I think thats suppose to help.