Okay ladies! I need your opinions! Might be a TMI at some points🙈

My monthly is 7 days late and breasts have been beyond sore! On Friday, I had a very small amount of pink on liner. It was about the size of an apple seed. Then after that there was nothing else. Today, I was very crampy. Around 145Pm. I went to the bathroom and there was a decent amount of blood on my liner. Nothing my liner couldn't hold though. When I wiped, there wasn't any blood. I used a tampon just in case. When I took it out around 8, it was still clean. No blood or anything. I'm still feeling sorta crampy, but nothing horrible.

Could this be implantation bleeding?