sex is painful... why me lord...

hey all... i have a problem... my fiance' has an average to large penis (i think it's pretty big anyway... but i don't have a lot of experience in penis sizes...) but when we have sex it is painful... it just feels too big. do a lot of other women have this problem? it feels like it's pushing too far in, and i get cramping and pain in my abdomen. not all the time... but usually it's uncomfortable. sex wasn't always like this for me, so i'm not sure why it's this way now. does anyone have any ideas! i feel like this is ruining my sex drive... emotionally... i just don't want to do it anymore. thankx Tweet