Please help. Has anyone ever been through this??

Today I’m 8 days late. I have a very regular 22 day cycle. Feb 25 i had cramping all day. I assumed AF was right on time. I continued to cramp for the next 2 days but no sign of AF. So I took a hpt when I was 4 days late and it was negative. I decided to wait to retest. I’m now 8 days late so i tested again this morning and again it was negative. But just now i went to the bathroom and noticed a light pink discharge when I wiped. Could this be implantation bleeding or my AF starting?? I have a 14yr old daughter but my pregnancy symptoms with her were completely different. What do you guys think? Could I still be pregnant?