Could i be Pregnant? Need Answers?

Ok so my are a little sore like they hurt ever time a push on them and I had one dream that i was pregnant. One night i felt a little nausea and sometime i get headaches for no reason. The past two days have been felling Constipation but i don't no if that is because i ate something wrong or what. Sometime i get mad for no reason or just fell mad. Sometimes i get dizzy and if i'm then i'm one 2 to 4 weeks pregnant. and today i'm spotting a little but my period just got over about a week ago. So could i be pregnant?