Cheating or not cheating?

my girlfriend and i moved here from florida im an over the road trucker one day her and i had a fight while i was on the road said some things that were not cool i left her a voice mail.when i cooled down i thought that's not right,we have each others p code so i get into her voice mail to take out the message i left before she could hear it. i am lookin for this voice mail and there is a few on there couple from her mom and daughter than i get to this one a man said i have not heard from you in a week im worried about you so i get into our phone records find out she has been talking and texting this guy for weeks many text. she flew back to florida to take care of a few things she text and talked to him the hole time she was there in every airport she text him right before she got off the plain when i was picking her up.come to find out she met him on facebook he lives in this town we moved to she has some medical problems and said this guy was helping her find a doctor. but this guy knew where i worked what kinda car i drive and knows im a drummer. so i ask cheating or not cheating