I am 22 yrs old. I had my last period on 26th July. I had oral sex with my boyfriend. He came on my breast. I was quite tensed and stressed during my personal problems after that. I missed my periods so I consult with a doctor. She gave me medicines and guaranteed that within3 days I'll get my period but nothing is happening. What should I do? Please advice and help

Call the doctor that gave you the medicine.

Agree, go back to that doctor.

Assuming this is the truth and you have not had actual sex and no sperm was rubbed or entered you, then you can not be pregnant.

So it is most likely stress. But only your doctor and perhaps some tests will know.