Might be pregnant, help, question, etc

So chances are I have a really high possibility of being pregnant. It's by a man that I've been with for awhile. I just caught him on Tinder talking to other women asking girls to call him. He says he never did anything with anyone. I'm just looking for advice from any female that had a similar experience that was pregnant by someone who is a precheater or maybe even a cheater. i have no other children and neither does he.