Plan B help

Its been 3 days since I took plan b and Im still feeling nauseus and dizzy once and awhile. Ive been rather hungry and crabby these past few days too. I didnt take plan b until 3 days after having sex and finding out the condom slipped off and inside me. At the time stores were closed because of Hurricane Matthew when we were in South Carolina. Im not on the pill either, I was until I lost my pack for this month (long story) so after trying to stay protected that happened. The sex was apparently around when I was suppose to be ovulating too. I just want to know if Im okay and that Im not pregnant.