Loosing hope

I’m 5 days late for AF, I’m not sure if I ovulated later that I should have😔 but I went to the toilet this morning and had a spot of pink cm, so I inserted the tissue up, and there was more. Not a lot. It’s no darker than this? If I wipe normal nothing is there?

I’ve also got very sore veiny boobs

Mild lower abdomen pain

Back ache

Dizziness

Could this be implantation bleeding?