Right. It's no good saying beauty is from within blah blah. Yes I totally agree it is but that does not help the OP.
I was about 37 when I felt like you OP. I turned heads a lot wherever I went (yes I will blow my own trumpet here), I looked and felt good and life was great. Oozing with confidence. Then one day it just suddenly stopped. It took me a long time to get over it! I am 44 now.
Getting married, having children, sleep deprivation, weight gain were my catalysts.
I really don't give a stuffing anymore and try my best to look passable - I dont ever feel I have time to look after myself anymore, and I don't, I certainly dont dress the way I used to dress as I am a stone heavier since children.
But I do still wonder why it all just stopped. I mean nobody EVER bloody looks at me anymore! I am not that bad!
All I can say OP is you still have it at 36 whatever you think. In 10years time you will be wishing you were 36 again - please dont wish it away, I would love to be 36 again!
And I also wish I let people take more photos of me and the kids rather than me taking every photo without me in it because I thought I looked terrible. I didn't and regret it now, I don't have many from the last few years of us all together which makes me sad.
I am happy now at 44 and accept life has to move on, I have produced 2 beautiful boys and would much rather be where I am, than not.