Madwaff, as the tallest female in my school, I sang not just tenor but BASS in the choir. It did get me a bit of ragging but it also let me learn a good deal about harmony since we basses never carried the main melody line. My range, or perhaps my ability to tap into it, expanded in maturity, and during junior year I moved up to tenor. Now I take the higher or lower part depending on with whom I am singing. One of my favorite folks to sing with is a man with a pure sweet tenor and I take the low end.
Like several on this thread, I have no trouble singing along well and truly but my voice suddenly goes weak or wobbly if I take a solo. I used to act in summer stock musicals and of course was always the lead's comic relief friend. Some law states the leads must be sopranos and must wind up with the most decorative guy, but fortunately the compensatory rule gives the "comic relief" friend the fun character songs and the interesting guys!
At a song circle in Co. Clare one time, a kindly elderly woman said to me, "Keep singing. You will find your voice." I was 52 at the time.
For years I thought it my luck to be born with the love of the song and the voice of an audience.
Now I have taught all my kids and rentakids and anyone else who will listen, "If you can walk, you dance. If you can talk, you sing."