Am I Pregnant??? Has thi ever happened to you?

Okay so my last menstral cycle was the 10th of this month lasting until the 14th! I started taking birth control for the first time in over two years on the 15th(pill)! It wasn't the right kind for me so I took it until the 18th and stopped, bled really bad on the 19th and haven't taken anymore birth control since! My periods normally like clock work and I would have had my period today before I took the birth control briefly! I'm just confused! Having light cramping etc... Thanks for reading