Does this sound like implantation bleeding?

I think I am 11dpo today. I woke up in the middle of the night last night to pee, and was shocked when I saw light pink when I wiped. That's how my period ALWAYS starts. I put a pad on and went back to sleep. I woke up this morning, and there was one more wipe of pink, but since then NOTHING, for about 7 hours now, not when I wipe, on the pad, or in the toilet. My pee is totally yellow. I have been feeling STRONG cramps today, though. Way stronger than my normal cramps.