Am i pregnant or is there something else going on?

Patient: So I have been on the depo shot for a year now. I didnt have my period after that at all except every three months. My boyfriend and me had unprotected sex and soon after that i started to have a clear pinkish discharge that i have never had before. I have had a off and on light period or discharge since then and its been about 5-6 weeks. I took a pregnancy test and it took a while but it showed a negitive. I have a second test that im going to take right away in the morning. I just wanted to know if its possible for me to be pregnant? and if not whats going on with my body?

Doctor: