I am 20 years old. I haven't had my period since May 8th. I took pregnancy tests that came out negative. I experienced a brownish/black discharge from the 21st of June to the 28th that I thought was implantation bleeding. However my pregnancy tests are negative. Then on the 30th a white discharge occured with a odd smell for about 3 days. Now I have a white discharge with no smell. What's happening?