Leaking white, pink and light brown discharge

My boyfriend and I had sex a couple days after my period which was on April 17-21. The condom came off, but he says nothing came out. I started leaking milky white discharge. We had sex again without a condom on May 2nd which caused me to start my period a week early. He didn't cum tho. I was bleeding pretty heavy for 2 days. On day 3 it stopped but I started spotting around 1:00pm. My boyfriend and I had sex that night and he came inside me. But i didn't think i could pregnant during my period. Now im leaking pinkish discharge and sometimes it's light brown. I would like to kno what that means. I've been having cramping in my abdomen and upper left thigh. I think i might be pregnant but im not sure. I took a test and it was negative. But it might have been to early. Please please please help me. Thank You very much