Going insane me thinks

So first day of my last period was January 31st cycles usually last 26 to 27 days and I ovulate, usually around CD14. I had a positive opk on CD12 (Feb 13). We BD'd CD11- CD14. On CD15 (Feb 16) in the early morning I had lots of ewcm mixed with some bright red blood spotting only on the tissue never saw in my undies. We BD'd that morning just in case and later on that day, no more spotting but I have been getting left side pinching and I'm super tired. Is it possible to implant early or is this all in my head?