Is my period coming or implantation?

I have 7 more days until I am suppose to get my period. I always get my period between 33-35 days. I woke up in the middle of the night with cramps and when I peed this morning it was brownish pinkish when I wiped. That happen one more time this morning but now nothing when I wipe but I this have some cramping. This would make it day 26 which is really early for me. Any advice?!?!?!?!?!