HELP!!

Sydney
So I was supposed to "start" my period yesterday, and it's just spotting! And it's the second day! Usually I'm very normal, and I don't know if that can be a sign of possible pregnancy or not or if I have to actually miss it the full 7 days! I've felt sick, nauseous, headaches, fatigue, ensomnia, and very VERY moody! I never get cramps with my period always the week before but this time I didn't get any symptoms. Please help! Any info would help! :)