The chances are low. Sperm can stay alive for a short time outside the body, and their ability to get fertilized decreases if they are out in the air and other unfavorable conditions. If you suspect that a pregnancy may occur, it is recommended to take a test for the presence of conception or ask your doctor about this matter. Menstrual cycles may differ and there are several aspects aside from the pregnancy that can determine when your period comes.

This cannot make you pregnant. Get your hormonal levels checked with a gynaecologist.

It’s not possible to get pregnant by doing whatever you have mentioned. Please do a urine pregnancy test through a kit that is easily available in the chemist shop. If it’s negative which is more probable, then you need to undergo a transvaginal sonography to understand the reason why you aren't getting periods. Once you get the reports you can consult doctors - Gynecologists in Delhi, also let the clinicspots team know if your city is different, or else you can approach me as well.