The first week in october i was spotting i think cause i gain weight because the last week in october i got my period but in november i had sex and i didnt get my period at all could it be irregular period i havent had no lower back pains i havent been feeln sick i've been feeln frustruate cause my period didnt come on and i been thinkn alot and last week i gained 3 to 5 pounds here it is now 2 weeks without my period i've been having lower stomach cramps and still havent been sick or nothing.All i would like to kno could i be pregant or could it be because i've gained weight the last week of november. PLEASE HELP!!!