Hi I am just confused whether I am pregnant or not since last three days I had been experiencing fatigue and after three days I am bleeding. I don't know whether it is a sign of pregnancy or not

It doesn't sound like you are from what you have stated. Best and only way to tell,
Home pregnancy test or clinic or Dr. for blood test.

Have you been sexually active? If so, did you use birth control? Have you taken a pregnancy test? Is your period late?

Take a test,, as soon as possible,, if your pregnant and also bleeding, its not considered to be a good sign,,

Are you due for your period? Is this bleeding happening at a time other than when your period would be due?