i have been on the birth control pill for about 5 months now. last week i was supposed to get my period since it was the last week of my pill pack. and usually my period usually comes the day of or the day after, but this month it didn't come at all. today i have some spotting but not enough to use a tampon it is a light red color and sometimes a light brown. i am also experiencing cramping below my stomach. i get random twitches in my stomach if i bend down or move in a weird way. i've had headaches everyday for the past 2 weeks and i'm also very tired even when i get plenty of sleep. i've tried not to think about it, or worry about it but now since i've been spotting its gotten me a little worried. me and my boyfriend rarley use a condom he usually just pulls out. anyways, could i be pregnant or am i just experiencing my period?