Could it be?

Me and DH are ttc. I had a brownish/pink super light “period” a week before my actual period is due. I had some very mild cramping. I’m still unsure if it was a period or implantation bleeding. I’ve had some bloating and some nausea (which I don’t usually get with AF). Since I’m 4 days pre period when it’s due, I took a test and it was negative. Should I wait and see if I get an actual period next week or should I assume that was my period? I also have a mild pinching in my abdomen that comes and goes. This would be my second pregnancy. 🤞🏼