hello ,am 25 weight 92 kg , i had my last shot of depo on the 15 june 2012 , was bleeding the hole of sept. n half oct. then my doctor gave me some 10 days pills to stop my bleeding on the 15th till 22nd oct , had some bleeding on the 1st nov to 6th nov and till today 17th dec hv not had my periods , am i pregnant ? am farting alooot n my nipples hurt , i sometimes hv cramps thankx