What if im contineuosly taking pills (avoid pragnancy) and my menstruation delayed abut 2 months is it normal?

Even while on birth-control, you still have a small chance of becoming pregnant, (especially if you aren't using condoms). You should consult you gynecologist or your family practitioner, there are many other reasons why you may miss a cycle, (or two). It may be nothing, but it's a lot safer to be sure. You can get a free pregnancy test at your local Planned Parenthood.