Hi I am a bit confused still, Can anyone help?

We just got the ultrasound done.. She was 11 weeks 1 day amenorrhea (without menses) on the 4th July 08. I only met her on the 4th of May 08. We had sex on the 5th.
The date of her last menstruation was 17th April 08. and the probable date of birth is 29th Jan 09. Does this make sense to anyone? I am confused as i count back 9 months from January it means she got pregnant before I met her.(in April?)

It says on her doctor`s account sheet that her `FUM� (last menstruation date ) was 17th April 08. .... Now I wonder would it be possible for her to change this date to a month ahead so as to fool. Would the doctor be fooled? or even know?
i am scared to tell anyone cos if it is not mine i would feel foolish. If it is well i will be surely happy
thanks

Has she had an ultrasound to confirm dates?

Sorry to hear that you are having doubts...

Couple of questions:

Why would she want to fool you?
Are you wealthy?
Do you own a home?
Do you have a nice car?
Are you good in bed?
Do you have any other children to raise?
Do you have any crazy ex's?
Are you able to hold down a job?
Do you come from a normal family?
What does she stand to gain from lying?

If you answered most of these questions with a yes then get a paterinity test

Another mathematical equation. You had sex May 5th. The baby is measuring 11 weeks on a sonogram on July 4th, and you're asking if it could be yours?????? Has she had sex with anyone else since you've been together? That would be the only way it couldn't be yours. Does she know you're doubting her? For your sake, I hope not.