Thanks for your query,
Blood flow after hymen
rupture is normal and occurs due to the tear of hymen .You have not mentioned whether your periods are regular or not? In a case of regular 28 days cycle chances of pregnancy
are less in your case. I will suggest you to do a home pregnancy test immediately to exclude pregnancy. Some times period may get delayed in otherwise regular cycles due to stress
Best of luck and take care.
Hope it helps..