Hello dear
I understand your concern
You have did sex 4 days before the ovulation
Precum contain sufficient sperm concentration and cause
pregnancy because sperm can live in the female genital tract for 4-6 day.
You took
Plan B pill after 60 hours.
It is 65-75% effective in preventing the pregnancy.
Pill itself cause delay/earlier your next period.
If your next period will delay by more than 2 weeks then go for urine pregnancy test and or blood
HCG test to confirm the pregnancy.
If you will be pregnant then still you can terminate intrauterine pregnancy by
abortion pill under the advise of the gynecologist.
Meanwhile avoid
stress, take healthy diet, drink plenty of water, maintain proper pelvic hygiene, do regualr exercise
Hope this may help you
Best regards
Dr. Sagar