Help me please!!

Hey! So this is my first time trying to get pregnant, I stopped my birth control a week ago and I had sex all my ovulation days and as of Tuesday I been having cramps like my period but I'm not due till the 11th of June, I also had a dark brown discharge and now I woke up to a big red blood spot, took a test and it says I'm not pregnant but also maybe its to soon, any idea what's going on? Could I be pregnant?