Why can't i poop after eating a lot ?!?

I pooped a few days before but i'm back to the way i am now... My stomach used to grumble and i would go to the wash room when that happens and something will always come out... but now it wont grumble or anything!! i just feel like my stomach is soo full... Is it because i ate too much fiber? I did ate a lot today.... and yesterday. I ate Japanese food yesterday right after i pooped and nothing came out after that....