Having a child at any age isn't easy. Let me ask this - what are the main reasons for wanting to have a child? If you want one because "something's missing in your life" or "so I can have something to love", then for the love of all that's holy, do not go and get knocked up. Babies are a huge responsibility - it's not going to just be playing with the baby all day for 10 years. It's a lot of hard work, sleepless nights, and misery. There will be times you want to rip your hair out. The baby will melt your heart for about a week or two, and then reality hits you like a ton of bricks. Nothing but feeding, changing dirty diapers, and incessant crying - that'll pretty much be your new lifestyle for 2-3 years, until the sprog can walk and it [hopefully] potty-trained. Once they're mobile, then they can run away from you, get into small spaces to hide from you - the insanity escalates to the next level.
You must think about all the work that goes into caring for a kid, and even if you are working two jobs, you could still be hurting for money once junior arrives. You'll need to pay for doctor visits, baby food, diapers, a crib, a stroller, clothes, bottles, and all the other crap needed to properly care for a baby.
Will you be able to handle the rumors and ridicule of classmates when word gets out that you got pregnant?
Also, what if your child was born with some kind of illness or deformity? What if your child had autism, add/adhd, tourette's, or any of the other such mental conditions? Kids with such disorders are twice the handful that normal kids are. What if your child had a defective heart, or underdeveloped lungs, or they had something that required them to take medication for the rest of their lives? That's even more misery in your life as well as money needing to be forked over for more frequent doctor visits. Do you know if you have any kind of inherited ailment that you could possibly pass on to your potential offspring?
Do not impulsively decide to have a child - you will be kicking yourself for it when you realize that parenthood isn't a bowl of cherries like most people say it is. It's the hardest job to do, if it's done right. Way too many "parents" do a crappy job of parenting because they're lazy and stupid.
In conclusion, all i'll say is I hope you make the choice that's right for you, whatever it may be.