I had anal sex 2 weeks ago and 2 days later i had an emergency surgery removing an ovarian cysts. my period is late. am i pregnant?

A very tiny chance: Women have more than one hole, but sperm must enter the correct hole in order to swim to the egg and create a pregnancy. Any activities in the wrong hole do not lead to pregnancy (unless other activities happen "in the heat of the moment"). One can consider using a reliable form of birth control if not wanting a baby, regardless of what sexual activities are going on, as life can be surprising.