I ve been off depo since 2013 and I have been able to track my mentrual normally it usually comes on time evey 28-29 days, but I was due for a menstrual this month on the 7th and it has yet to come, I took two hpt a week apart, but negative results. Should I take another one. Also I also smoke marijuana every day, could this cause my menstrual to be off I could I be pregnant, should I go to the doctors for a blood test of should I wait another week to see if my menstrual will come?