I Just Want To Know If Their Is A Chance

I just want to know if their is a chance I'm pregnant. I got my period on May 16 and it ended on May 22. In June I was supposed to get my period but instead a week before my period was supposed to start I started having spotting along with slight cramping and the spotting didn't stop until about July 5th. My nipples are sore when I touch them sorry for tmi and when I lay flat on my stomach their is a certain spot where it's hard. I also have a lot of headaches, I feel dizzy, and my stomach get upset and I feel nausea. I also want to know why I spotted for that long.