I was 18, DH was 19, when we got married over 27 years ago. I had DD when I was 21 and DS when I was 23.
Looking back, we probably should have waited a few years to get married, but, at the time, we didn't want to wait.
My life now is pretty good. Our kids are almost 25 & 23 and we're still relatively young (45 almost 46 & 47). We are in pretty good shape financially, we go on vacations pretty frequently, with and without the kids (more without, which is nice).
The first few years were hard, but we got through them, despite what a lot of people said and thought!