It's just a number really

I've been thinking more and more about what to expect as a PCV. One thing that I am slightly concerned about is age. I'm only 28, but most volunteers seem to be closer to 24. And by the time I actually get there I'll be closing in on 29. And by the time I complete my service I'll be near on 31. That slightly frightens me. Will I fit in with the younger crowd? What will the people in-country think of an old maid with little in the way of marriage plans? Will there be other volunteers in my group that aren't fresh out of college? I don't really think it will be an issue once I get there, but me being me, I worry about silly things like this. Plus, once I get back, will I be too old to start the next phase in my life? What do I want to do after Peace Corps? Will I be ready to get a PhD by then? If I do decide to get my doctorate, that will be another 5 to 7 years and I could be nearly 40 by the time I finish. I still really want to do Peace Corps, but am I just postponing what I need to do with my life, or is it my chance to see a path I might not have considered before? I still have a few months before I leave to think about these things, so hopefully I'll sort some of these things out. Blah. Self doubt sucks.