Is it possible for me to be pregnant if I'm a month late on my period but last time I had sex was sept 18 and I spotted in oct on the tenth and it wasn't a normal period.I've been feeling sick and everything I eat I don't finish,my back hurts and I got the urge of throwing up.I'm sleepy a lot also.. I took a home test and it was negative.my breast hurt and I toss and turn when I sleep.. could it be possible?