The best way is to take one of those pregnancy diagnosis tests, available in almost any drug store. You don`t need any prescription to buy one, and all you have to do is put your urine over the device, which sort of resembles a thermometer (at least this is the case where I live), and wait a few minutes. The pregnancy hormone in your urine is detectable as early as the fourth or fifth week of pregnancy. You`re probably almost 5 weeks pregnant so wait a few more days to try this method. If, however, after another week you still haven`t gotten your period (this would make you 11 days late) then you are most likely pregnant.