Dear Dr. Im frm Chennai, I had my last period on 21 Jun 12, and also my periods are irregular. When I missed my period on 21 Jul 12 I have taken urine test I was negative, and I have checked on 2 Aug 12 it was also negative. As per my dr advice I have taken 10 days tablet for my period to come, after that 10 tablets also I'm due more than 10 days now. My lower stomach is little bit big now and I never feel morning sicknesses yet.So I'm little worried that will I be pregnant?

Are you able to buy home test kits at a drugstore without going to a doctor? If so, you should have been testing every few days or a week during this month, using first morning urine.
What is the name of the pills you took for 10 days?
No one can tell you online if you are pregnant or not. You may be pregnant, or you may be having symptoms of your next period due, which are often a lot like symptoms of pregnancy.
If you are pregnant, you would be assumed to have conceived around July 5, about 55 days ago. Take another test (which occasionally can show negative even if you are pregnant) and then have an ultrasound if needed, and try to make a decision about the fetus within the next 3 weeks.