First Pill Advice ASAP!!

Nadia

Hi Guys, please help!

I was put on the pill after 4 years with an IUD. I was told to take it between the 1st and 5th day of my cycle. Today was suppose to be the 5th day of my cycle as i usually have a 6-7 day cycle. However, It seems to have stopped yesterday as there is no blood visual. I took the first pill regardless. But, i am not sure if I am immediately protected or not (as my period could of ended on the 4th day) any advice ??