Been there done that
When I turned 25 I was seriously in a funk that I never thought I'd get out of it but you know what? I did and I'm ok. I'll be 32 this month and am long past thinking I'd have a family by now, it's no longer a necessity (how sad is that?).
I read a book that I think was actually called quarter life crisis and it was really good. If I can think of the actual name I'll let you know.
Happy Birthday