HELP!!! A F 5DAYS EARLY

teegurl
Not sure if it's AF but am cramping and been cramping for like two days now. It's not bright red it's pinkish/brownish sorry TMI. Am very regular 27dys.Have been a day or 2 late but never 5days early. Have been ttc for almost 4yrs now and this has never happened to me. Am just so confused would appreciate your thoughts and experience.