Doctors consider the week of your last period to be the first week of pregnancy (even though you aren't even pregnant at that point)!
For humans, you most likely won't even know you're pregnant.
No
yes
no it is not to early
No. You can get pregnant in the week(s) before your first period.
At least 3 but usually 4 at the earliest for most women. The first week of pregnancy is actually considered to be the week of your menstruation.
The first week after, and the last week before a woman's period.
yes, it is very normal to burp while pregnant, even if it's only your first week. it just lets you know that your body is adjusting to having the baby inside
a woman can get pregnant before one or two days of her periods --- A woman has a lesser chance of falling pregnant with in the first week after her period. After the first week she is at high chance of falling pregnant, especially within the last week before her period. ----
The first week of pregnancy is technically the week your menstrual period, you technically have not even conceived yet! By the time you actually conceive you are about 2 weeks pregnant! (weird I know!). But you should gain about 2-3 pounds the first trimester.
How do you know you are pregnant in the first place?