Yeah, I was like you. For years I wasn't planning on having any kids....you know women's lib thing.....school, career, secure financially, etc. Then my biological clock went off and had two within two years: a girl and then a boy. Perfect Presto! About 6 mos. after my second was born we were up to our eyeballs in diapers, bottles and binkies and one very colicky baby. My husband came down one day and said he'd made an appointment to have a vasectomy and I was cool with that. I was overwhelmed with babies and the thought I definitely don't want any more. Besides two seemed politically correct if you know what I mean. Now here I am ten years later living with the biggest regret of my life. What I wouldn't give to go back and have two or three more. I always thought kids were these life sucking, emotionally and financially demanding monsters. Pretty harsh huh? I was so wrong, they're the neatest little people in the world. It never amazes me what they say and do and they can be pretty close to geniuses. But then I am biased.
All in all, wait a year or two, or maybe even five and then reevaluate how you feel. You never know you might change your mind. And if you don't, then at least you know you'll have spent enough time thinking about it before you do anything serious.