I got my BFP now what?

Yes, call your dr right away. Early prenatal care is essential for a healthy pregnancy. Umm... I'm not certain about the X-rays.. you might want to call your doc ASAP to find out. As for finding out how far along you are pregnancy is calculated from the first day of your LMP. So if the first day of your last period was 4 weeks 3 days ago then your 4 weeks 3 days pregnant.