midlife crisis? at 36?

for months i have been questioning my vocation in this world. my calling.
i have been singing since i was probably two years old. or so my mother says. she has told me many times that i was playing in my room one day and she heard me singing. not all that strange, except, it was in LATIN. what the....? i can only hope that i flipped my r's appropriately and avoided diphthongs.
anyway, i have been singing and playing instruments, and have loved every minute of it, since the beginning. i begged my piano teacher to take me at 5 instead of 6, because i just couldn't wait. and besides, i was already playing my sister's piano songs by ear. i started violin in 5th grade and brought home the instrument we were not supposed to play until we knew how, and picked it up and it became an instant extension to my shoulder. perfect. i loved it. i never wanted to put it down.
i chose singing because it sort of chose me. as principal second chair of the symphony in undergrad, and a good leader, but not all that disciplined as a violinist, i wore ball gowns and off-the-shoulder numbers to concerts, rather than just gig black. i guess that was the first inclination that i probably should be a singer.
but lately, and especially this weekend, i'm just tired of the baggage that comes with singing. i'm tired of "constructive criticism". tired of "can you try singing it this way?" no. i can't. i cannot sing any louder, any better, or with any more feeling. i'm tapped out.
now, i'm sure that's not true. i'm sure i'm just in a slump and it's the end of the season and i have a million concerts right now and i'm just burnt out. but you can't BE burnt out when you are singer. you have to be ON. lovely. confident. oozing sensuality and joy. gag me.
all i'm oozing right now is snot out of my left nostril, thanks to this allergy season from hell.
but i can fake it till the end, as long as people can just all back off a little and stop telling me how to sing, when they're not even singers themselves!
so then i started thinking, after my little fit, what would i do if i didn't sing?
two things came to mind: cooking and writing. so i think i'll merely add those to my life and see where they go, and that will give me some time away from singing and teaching. if i can just unplug for a few hours each week, that might save me.
tony bennett quoted that when he gets tired of singing, he paints. when he gets tired of painting, he sings.
how brilliant.