Welcome to HCM.
First of all one should not consume those pills without the supervision of the doctor. They can cause serious side effects.
I advice you to perform urine pregnancy
test. It is better to use early morning urine sample.
If it is negative chances of pregnancy is slim. As you have consumed the pill and you have not got your bleeding it is better to consult the OBG specialist for examination and also to find out the cause for irregular periods
At your age PCOD
is one of the common causes for irregular bleeding that will be ruled out by scanning.
I advice you if you are not planning to be pregnant it is better to use some means of contraception
Hope I have provided the information you needed.
Wish you good health.