yes, it happen to me too, being more self conscious, from obese to obsess if I may say..
but then i felt sick with it, insomnia, checking on plastic surgery website, insomnia, crying, etc
but then i look back at my heaviest body pic, and my 1st reason to start lose weight coz i wanna be better, and i am (-40lbs better) even with stretch marks or some lose skin..
then i try to see the bad part of being "so-called-perfect' face/body that hollywood actress has, mostly its good for short time then turn bad after some years, so i decide : enough means enough
i hope u could find ur positive affection