I had sex one day before my period and there was blood, i was like okay, period blood, but after that day there was no blood and it hurts now.

Vaginal pain & blood: Pain and some blood could occurring from sex. If the pain worsens or doesn't go away after a day or so, you should get checked. The period may come soon. If not, consider a preg test.

? light period? : ? Bleeding that was not a period? 1. Take home pregnancy test (to see if pregnant from prior to that time. 2. The main reason for light periods is a change in hormone levels. Causes for what seems to be a light period can include: implantation bleeding in early pregnancy, thyroid problems, eating disorders, excessive exercise, initial periods for a girl, use of an intrauterine device, oral >.