I took one injection of depo and let it expire. I started nuva ring after I got my period. I took the nuva ring out when I thought was the time then I had sex with and without the use of a condom. For the past few days I have been having a brown discharge, and the discharge started about 14 days after I last had sex. The discharge is light and only requires me to wear a panty liner. I have not had a period since last month. I am not scheduled to have another period for another week. I am currently wearing a nuva ring that was placed in after I had the unprotected sex. I am 22 years old and I am afraid that it may be implantation bleeding. Help, anyone?

Call the dr... it can be anything... some bleeding or even an std