To know for certain how many weeks pregnant you are, you must visit a doctor. You can estimate how many weeks by knowing when your last period was and counting from there. Some keep track and know when the specific date of conception was.
Go see a doctor and have a test done and a ultrasound.
With in 12-24 hours your body knows its pregnant. But you wont know for about 3 weeks.
If you are 12 weeks pregnant, it is not implantation bleeding. Consult your doctor right away.
You will be able to know after 2 weeks.
When the gestational age of an embryo is 12 weeks, then you are considered 14 weeks pregnant. The first 2 weeks of pregnancy is the week of your last period, followed by the week before your ovulation, therefore, as soon as your egg is fertilized you are already 2 weeks pregnant!
12 weeks ago...
You did not get a period while you were pregnant.
Roughly 1 to 12 weeks.
Today (13th July 2008), you will be roughly 27 weeks pregnant
yes
3 Months.