Hi I am 21years old. Its just been 11 months after our wedding. So me, and my husband decided to have our 1st baby.

But I got bleeding as a normal periods 5 days before my due date of regular periods. Can it be implantation bleeding? Please help me as soon as possible.

I assume you mean in vitro fertilization. That's a matter for your doctor as an exam may be needed.

Implantation bleeding is pretty rare. It would be so much easier if we had an early indicator before the missed period. :) Please read this link about implantation bleeding.