- hello , im 18 and i have been havin sex UNPROTECTED nealry everyday with my husband for the past 9mnths , i recently got off depo after a year in december and instantly had period , then missed period in january and had one feb. 2 it is now march 6 and i havent had one , i had sex the night that i was suppose to come on period i had very light bleeding until i urinated and then it stopped! experiancing nausea mild cramping back pain and headaches