How can i assure that im pregnant or not..or should i take pills..i had sex 2 times..1st time one month ago n missed periods and then 2 days back i am?

Can do a preg. test: Home pregnancy tests are very accurate and not affected by foods, herbs, common illnesses, sexually transmitted diseases, vaginal spotting, or medications. A test gives a reliable result 3 weeks after sex (3 weeks after when conception might have happened) or 1 week after missing a period. If done sooner, a negative result may be due to testing too early such as less than 2 weeks after conception.