Implantation bleeding or early period?🤔

I've been trying to conceive for a few months now and have been tracking my fertility. My period is usually pretty normal. I took a clearblue fertility test last Sunday (7/09) and it came back as peak fertility so my partner and I had sex a few times that day. So yesterday morning I woke up to very light cramping and light spotting (7/16 exactly a week after). The spotting was off and on all day but last night it started to get little heavier and a little more red. I've read that implantation bleeding is usually very light and no red but pink or brownish. My period is due next sunday (7/23).

I'm still spotting this morning with very light cramping. So could it possibly still be implantation bleeding and I might be pregnant? Any insight would be helpful!😊

Also this would be my second pregnancy (I have a 2 year old daughter) and I didn't experience implantation bleeding the first time so could it be worse the second time?