Implantation bleeding or??

Al

There was some light red on the toilet paper when I wiped this morning. It happened two times but not again since. Pregnancy tests are still positive, but I’m sure my levels would still be there even if the worst was happening. My lmp was 8/22 and I was due for my period two days ago. Ive had positive tests since Sunday. Is it too late for it to be just implantation bleeding? Has this happened to anyone else?