OK had an ultrasound done at 6 weeks and according to that I should 11 weeks and now I got a ultra sound today it is showing 13 weeks so is this what the docs will go by or will they go by the frist ultarsound?

So, forgive me, but I forget how far along you are now. They will not necessarily go by either ultrasound. All they are really doing is looking to make sure that baby is growing well and is proportionate.

O I am supposed to be 11 weeks but the ultrasound shows 13 almost 14 weeks

There are many variables here. Baby could be big for age, conception dates could be incorrect, etc. How is your blood pressure? High? Low? Normal?

Are you diabetic? Is this your first? Could you have Gestational Diabetes?

There are many many reasons that could cause this confusion in dates, most are harmless. If your doctor is not concerned I wouldn't worry about it right now.

Well this is my 3rd child no I'm not diabectic I check my sugar just in case and my blood pressure is normal I was just wondering because they are going to take the abay at 36 weeks because of the kind of c-section I had I'm not allowed to go in to labor so I was wondering when this would happen now that the dates have changed?

This happens to many women for many reasons. You see, diagnosing EDC (Estimated Date of Confinement) or due dates can be tricky. Some baby's grow more than others at certain stages, due dates may have been miscalculated the first time around, etc.