Implantation bleeding

Hello. For those of you that have experienced implantation bleeding I have a question. About 10 dpo. BD day before and day of ovulation. Yesterday I noticed a very very light brown colour to my CM (almost like the last day of your period etc) when I wiped. Lasted about 24 hours. Only noticeable on the toilet paper. 5 days before I'm due for my period. I never ever spot. So this is an odd finding for me. Just wondering if this could be implantation bleeding. I'll test if I'm late, but I am just curious!