Hi I'm 25 and I have stoping taking the shot as of November 2005. I have had 2 periods since then that was in September and October 2006 haven't had one since I am not pregnant but I do have unprotected sex all the time. For the past few days I have been having a lot of cramping like my period is to come but nothing yet. So my questions is how long does it take your periods to become normal again and can i get pregnant even if I haven't had a period.