Ladies im ging crazy ..im 22weeks pregnant......and i think i my bf is cheating on me..?

here's the story......this woman that my boyfriend knows before he met me.......he claims that they're only friends......besides one time i go to her house to eat.....and thats about it......because she was the wife of one of his friends....by they divorce....anyway she just call our house......and my boyfriend answer...but i did'nt know who the person was......just my intuition tell me that it was her.....anyways i checked the incoming call on the phone...my boyfriend deletes it......the dumb azz call her back then soon after he left......so i hit redial .....and i saw her number come up....so im just waiting for my boyfriend to come home to confront him.....then our relationship is over.....im doing what best for me and my child....he can go to hell.....he's not going to be allowed to get access to my child....at all....as soon as i have my baby im movin to another state........and im also gonna mess him up when he comes home.....thnx u for reading .......what should i do.....