Hi Eucharia. As long as you're firtile you can always get pregnant. I've heard of women having healthy babies in their 60's!
And don't worry a whole lot about having an unhealthy child, especially if you yourself are healthy and have been preparing your body for pregnancy. Much of the hype about older women running a higher risk of having kids with Downs syndrom, etc.. has been based on (age group statistics). And there aren't many woman who choose to have babies after 40. So what I'm saying is that those statistics are of a very small group of women. You have no more to worry about than an 18 year old girl.
Good luck having your baby!