Hi. I Have Been On Depo Provera. I Just Had

Hi. I have been on depo provera. I just had 1shot on the 17of October 2014. My next shot was due on the 17 of January 2015 but I never took as I hated the side effects. Since then I have been using condoms, but as my period never showed up and I know its dificult to conceive after the depo shot we got lazy and stop using them about 2months ago. About one month ago I went to my gyno and the said I had a 2cm cyst on my right (I think) ovary but it seemed to him like a functional cyst(?) He said it was normal but to come back after 3months to make sure. Last night I went to the toilet and noticed some brown on my nickers. Also after I wiped I saw a bit of brown mixed with normal discharge with no odor and it wasn't homogeneous either, very weird. I also felt a bit sick today after a drive and I was sitting in the front of the car, it got worse after a I came home and smelled garlic while I was cooking, but also I hadn't eaten so maybe it was because of that? I did a test last Monday cuz my husband insisted I got a belly all of the sudden but it was a clear negative so I doubt I'm pregnant. Any idea if this is my first period after depo? Thanks