i understood your concern .If you have negative pregnancy
test than nothing to worry,
But if you are in doubt with test than please do following two test
1. blood B-Hcg level- IT will definately show your pregnaacy
If it show you are pregnant than do
2 . Pelvic USG to locate pregnaacy.
If everything comes normal and you are not planning for pregnancy than use contraception
2 ocps like T novelon/T femilon
if you are not Hypertenive/migraine/obese
3 IUCD if you have already a one kid.