I have already had a regular period this month, I started on the 5th. Well I'm worried because I just started spotting a little bit today the 23rd.. and its not time for my period. I have been sexually active also. Could u please tell me why this is or what could be the cause?

Could be from recent sex (last day or two)... breakthrough bleeding if you are on the pill... ovulation... hormone changes prior to next period... possibility of implantation bleeding if pregnancy occurred.