i am 21, i weigh about 65kg, i started getting the petogen injection 2010 may and since march this year 2011 i havent gone for the injection again as i am thinking about starting a family, i havent had my period since i started using the petogen and still not after i left it, i know they say it takes a while for it to get out of your system but im getting quite nervous,, its been 4 months, is that normal, should i wait a bit longer?