I also get nervous on "notifications", sometimes I think I've said something out of line to someone and Dee is coming to tell me off!!
Regrets? sometimes when I sit back and think of my 31 years so far, I can find loads, not maintaining friendships with many friends from high school, choosing a different career path, past relationships I've been in, certain decisions in life that have impacted where I am today!!
But I guess we don't know these things at the time, hindsight is a wonderful thing, and that makes us who we are, living life as we see it and call it at the time as it happens, it doesn't make things more right or wrong than anyone else's.
We'll all go through different milestones at different times, but I know what you mean, 30's seem's to be the time when the volume of wedding invitations and christenings seem to be cropping up for the majority of people I know, but that doesn't mean we have to be doing the same things to be having a "successful" life!!