Here's my answer:
You weren't the only one with a freshman inferiority complex at Wellesley. I had gone to a big public high school where I got all A's. My first semester at Wellesley I got some C's and D's that really hurt, and, though I loved the college and grew and learned, I never had a clear focus until I went to graduate school and studied Classics. Poetry as a serious endeavor came much later after years of being an academic. I'm glad to have found it as late as I have. It's undoubtedly too late to become a well-known poet, but that's not why I write. Stanley Kunitz once remarked:
"Through the years I have found the gift of poetry to be life-sustaining, life-enhancing, and absolutely unpredictable. Does one live, therefore, for the sake of poetry? No, the reverse is true: poetry is for the sake of life."
I think that is a good guideline for everyone. Enjoy who you are and what you do, accept the ups and downs that will come, and let the things you care about fill and enrich your life. For me, one of those things I care about is, of course, poetry.