I have experience. I have 20 years of experience at becoming a mother @ 16 years old. My honest advice is don't do it.
There are so many things to do, so much education to have, so many places to see, so many times to spend alone with your boyfriend/husband/lover. So much life to be lived when you are not tied down to being a mommy.
A mommy is a 24 hour a day job. This is not babysitting. This is not having someone else's child for a weekend/week/month - this is every minute of every single day for the rest of your life.
If you 'miss' having kids in the house, babysit. If you 'miss' having all the noise and commotion, go get a job. Go to school. Get a degree. Travel the world and the seven seas. Do something unexpected! Take a class on stained glass making. Be completely selfish. Sleep until noon on thursdays - then stay up all night long for no reason. Eat whenever you want to eat. And whatever you want to eat.
All of those things sound simple enough - but when you are a mom, they are like driving a golf cart to the moon. You just would never get there.
Are you aware you can have kids until you are in your 40's? Dude! You could live a whole other lifetime before you actually had kids! Even then you would only be 32 years old! (which is still young from where I am sitting!)