Does anyone else feel this way?

as i am gettin older( i am in mid 20's i was already pregnant once had a miscarrige) i thought i always did want kids, iam watching all our friends having babies, the more people i see having them the less i want to have one is seems i dont know one realtonship were i look and think thats what iwant after they have had kids and when i have tried to talk to a few girlfriends of mine about this i get very strange looks, also i wonder if our society makes women think they have to have kids and thats y alot of women want them i am not saying all women its just a thought,has anyone else decided not to have kids if so why?and does anyone else feel this way?