No you are not pregnant. Your pregnancy test was negative.
About 20-30% of all cycles on the pill will have no period. Or your period may be very light, such as a day or two of spotting. This is a common and expected side effect You can read more about it in the information that comes with your birth control pill. It is not harmful and does not mean anything is wrong.
I see So your period is just delayed. You are not pregnant if your pregnancy test is negative. There is no medication you can take without a Drs prescription to start your period. And no Dr is going to give you a pill to start your period when it is a week late since it is not medically indicated. Try to relax Your period will come.
Usually a late period starts within 2 weeks
AT that point you should do another pregnancy test and wait one full month. If after one month, it does not come, then make a Drs appt.