Heavy implantation bleeding

I know it's supposed to be light but I have read a few women where it was heavy and went on to have healthy babies. 7dpo and started my Period which is very unlike me. I have never been early. I was wondering if it was implantation but felt discouraged because it was heavy but it only lasted a day and a half and is now spotting and brown. Anyone else experienced this? I feel crazy but I could bet my life savings in my period so this is weird for it to be a week early.