I got married at 19, it was 13 days before my 20th birthday. While I was pregnant, pregnancy was not the reason for marriage. We had planned to get married the following summer, but with a baby on the way we bumped it up a year. No one pressured us and we didn't feel forced. We didn't want to live together before marriage, so it all kind of fell into place. We have been married almost 4.5 years, have 2 beautiful girls and are very happy.
I think teen weddings are kind of pointless, I don't know what the big rush is. Why not wait until you're both able to have a decent wedding and get to know each other better? I personally would rather break up with someone rather than go through a divorce at 17 or 18..
I was 19 (4 months from 20th birthday), dh was 23. We were pregnant with twins, although we only knew about one of the boys. We got married because we wanted to. It was being planned prior to the pregnancy. This January will be our 7th wedding anniversary, now we have 3 kids ages 6, 6, and 4. Our marriage is great, our communication is great, and we work well with each other!
He and I still manage to have fun with each other, even after being married and having kids!