Implantation Bleeding Or Period Blood

My Last Period Was April 29th .. I Had Sex May 10th . 12th , & 13th Unprotected Sex .. I Ovulated On The 13th Thats What My Calendar Say .. I Started Cramping On The 12th Cramps Where Mild .. Then On The 14th The Cramps Where Stronger .. Yesterday Came (May23rd) I Went To The Bathroom That Morning I Wiped It Was Pink Spotting .. A Hour Passed Went Bavk It Stopped .. This Morning I Woke Up I Went To The Bathroom And I Wiped It Was Redish Brownish .. i Dont Have To Wear A Pad Or Nothing Its Only When I Wipe My Expected Period Suppose To Come On May 27th .. Any Help On What I Should Do Or What It Is ?