[jolie]

Most adults go through something like this. You start to realize you're not as successful/confident/responsible/etc. as you thought you'd be by now, and you kinda freak out about it.

Losing motivation and feeling lost -- just about everyone I know has been there both personally and professionally at least once in their mid-20s. Seeing a psychologist might be good, but if I could give you a word of advice, I'd just tell you to start expressing bits and pieces of these feelings to others you trust. Chances are, everyone else has dealt with or is dealing with similar issues and will know what to say about your specific situation and personality.

I wish you lots of luck in your "striving to be self-actualized," as you put it, and I truly wish you happiness! Being ambitious is tough; the flip side of that coin is never being satisfied. Sounds to me like you have a little bit of both going on.