12 dpo bleeding?

Yesterday I was 12 dpo and I woke up with some spotting. I didn’t have any spotting the rest of the day, but last night my husband and I had sex and I bled all over him with dark brown/red blood. This morning there was nothing except a few tiny spots of brown blood on my tampon, probably left over from last night.

My question is, could this be implantation or is 12 dpo too late for that? For my first pregnancy I had very heavy implantation bleeding at 10dpo. Do you think it’s just early period blood or is there still hope for me this month? My period is supposed to start tomorrow.