My husband and I had our first child 10 weeks ago.  This is after 5 years of being together.  He went on his first business trip since having our daughter (in fact 2 weeks ago - our child was 8 weeks old).  I felt in my heart something was wrong on this trip, something just didnt feel right.  The first week he was back, he treated me and our baby different (very distant...slept upstairs, etc) then changed into a VERY sweet man for the past week.  Last weekend, we went out to a party and got a babysitter.  He was so flirty with me, VERY complimentary, etc.  He made me feel great.  Then last night I had to use his cell phone and noticed a text message from a girl I didnt know with a strange area code.  I looked through the messages and found that the same night we went out and he was so sweet to me.....he had text message this same girl about 8 times back and forth about how much fun he had on his recent business trip.  This included telling her she turned him on, had fun memories of his trip, couldnt wait to see her again, would make a trip back to the area to see her, etc.  I then checked his cell phone calls and he called her 3 times at 5:30am on the morning he was flying back home from his trip. 

After calming down I confronted him last night and he denied everything (of course).  He swore nothing happend, that the text were just stupid and he would have never went through with any of it.  I know in my heart he's lying but I dont know what to do.  I have the girls phone number....should I call her?  I'm a new mom.....gosh....this should be the happiest days of my life and instead I'm pretty positive the love of my life and father of my beautiful child had an affair or was planning one. 

I'm at a loss for words and truly do not know what to do.  I told him last night that I wanted to seperate.  Anyone want to give me your two cents?  Please consider our new baby in your response....if it wasnt for her...I would be gone today!!  I'm afraid to talk to any of my friend or family because I'm so ashamed....I guess I had this perfect life and now its crumbling.  Did I mention that we weren't supposed to be able to have children?  Yeah...our child is a miracle....I'm sure someone out there has been through something similar...