AF or IB..What is going on!!!

Blessed2bemommyagain
Ladies have you had this happen?  AF is not due until October 4 I'm at work right now and went to the bathroom and I have some bright red spotting.  Could it be Implantation bleeding? I definitely cramping and tired but of course AF gives the same symptoms.  I've been testing for the last four days and have had a few tweaks that are keeping me hopeful. I'm just shocked because my cycles are every 27-28 days like clockwork,, Last one was 9/8.  If today is AF,  that's only 29days😥😥😡😡