Hello dear
I understand your concern
Pregnancy is possible when unprotected sex was done in fertile phase of period.
If condom was not broken then no chance of pregnancy as sperm can not enter the vagina.
Spotting could be due to
hormonal imbalance,
implantation bleeding, premenstrual symptoms, excessive
stress, change in life style and dietary habit.
I would suggest to wait for period to come
If period will delay by more than 7 days then go for urine pregnancy test and or blood
HCG test to confirm pregnancy.
Avoid stress, take healthy diet, drink plenty of water, do regular exercise and maintain proper pelvic hygiene.
Hope this may help you
Contact further if follow up needed
Best regards
Dr. Sagar