Thank you for your help it really did easy my stress
Then it seems quite clear that you ovulated and conceived right around the 24th of February. Don't worry.
Yes I've had an ultrasound at 12 weeks my estimated due date is Nov 17 2014 and yes the period in Feb is the only one I've had
You had no period between the one that began on February 10 and when you had sex with your ex on March 5? That would suggest you got pregnant in February, not March, unless your menstrual cycle is really irregular.
Have you had any ultrasounds? How did you get the 14w1d count? When you had your first ultrasound, how early in the pregnancy was it? Did they give you an estimated due date from it?