First time anal....TMI

Pebbles
Okay so last night me and my partner tried anal for the first time, it was a bit painful at first but i kept making him pull out and stop because i felt Like i was going to poop, i pooped before he came over but i was still worried about it happening, so im asking two things, 
1.is it going to hurt everytime we do anal ?
2. Does the feeling of me possibly pooping during anal eventually go away ?