I was pregnant at 16 and 17 when I had my daughter.
I, stupidly, got married in between.
The marriage was a disaster, the baby not so much.
I would say that you can do everything you want to do when you have a baby, but oh my god it makes things harder.
Harder to just "got to work" you've got to get them up, to the childminder whatever before you even start.... but I'm sure you know all this.
I echo what the other posters have said about being out of sync with friends. When my DC was a teenager they were all having babies and I wasn't that interested. Now I have little grandchildren they all have teenagers and are not interested in the baby stage.
If you split up with a partner a grumpy 6 year old does not help in the dating stakes!
.. I also echo what an earlier poster said about thing beyond the baby stage - not many people say "I really really want a 7 year old" and you always end up with one of those!
I have a DN who had a baby at 15 - he's 6 now and she is the most isolated, lonely, broke person I know - she was centre of attention when pregnant and when he was a baby but she see's literally nobody but her own Dad now. Everything that is difficult about having a baby and a small child has proved too difficult for her and she has basically given up.
I think she is hoping that when he is about 15 and she is 30 she can "start her life". Very sad really.
I hope this helps? It's too hard to say whether or not I regret having a baby that young because nobody would want to say they regret having their child - I love my DC and wouldn't change that aspect - would I have liked more or a youth - yes - but I'm not sure it wasn't the long term relationship (marriage to a much older man) that got in the way of that too!
I got back on track in the end - but only when I was about 33!!!