werid period ?

Marie
Hi lady so idk if I'm in my head or what but I usually have a 7 day period and this month has been really werid for me I've been cramping 3 weeks before my period actually started which was early and it only last 2 days with 1 and half day with light spotting. My periods is usually a week long with constant flow, and this time around I couldn't wear a tampan I usually could but I just felt so uncomfortable with it in. My boobs been having these sharp pain in them, and that's unsual my period are so irregular but I never had this short or a period. Do you think it's possible I'm pregnant me and my Hubby don't use protection. I might be in my head but I'm just a little confused on why I'm off already? Any suggestion will be greatly appreciate it.