So if it's the first day my period would of been here already right if my period started on the 11th of last month meaning I'm 5days late

First.

first day

its the first day of your last period trust me id know this is my 4th child lol @lesliehoward0501

Ill just wait and find out if I get one or not at the end of this month

I thought you counted it by the first day because it was the first day of your new cycle I.e. I get my periods every 27-28 days starting from the day my period came the month before. My period came 2/17 so today is day 27 of my cycle, make sense?

its when you started just like a doctor would look at it.

When you ended

So if I started it on the 11th of last month , then I would of had it already this month ??

first day for pregnancy but last if you think you missed it

I always thought it was when you ended it .. In that case then I'm 5 days late

The first day .. I'm pretty sure