Hi My Name Is Niecey, Can You Tell Me What

Hi My Name Is Niecey, Can you tell me what this can be. I had a really weird period. And i only had bleed when i pee and nothing was really my pad for real. I had got off Thursday March 17th . Me and my boyfriend had sex and after i started to bleed real light and then it stopped. March 18th it did the same thing then. Monday March 21st and Tuesday March 22 me and my boyfriend had sex and no blood. What could it be.