Is This Implantation Bleeding??

Hey guys! I have like a week or 10 days something like that until my period and I never spot before my period and I usually don’t cramp until I’m actually on it. I cramped a few times yesterday and was spotting. Today it was a tiny bit heavier but not like my usual periods AT ALL.

According to every website I calculate how far along I am according to my last period, I would be 3 weeks along as of today. I researched as this wasn’t exactly planned, and I feel like I’m having implantation spotting/bleeding. It was brownish but more pink yesterday. Today it’s more pinkish red when I wipe but brown on my panty liner.

Pictures go in order. The lighter colors were yesterday and the rest from today. I should mention I’ve been feeling nauseous on and off and my boyfriend (the one whom would be the father) has a twin.