What is this

Sorry for the picture as it may be TMI but I ovulated on the ninth and BD on the 10th. My period is due the 23. I’m having bits of pale yellow discharge, yesterday it had a light pink tinyyy spot in it. Wondering if anyone else experienced this around implantation. No itching or burning, no weird smell or anything that would be sign of infection. Having lower back pain and cramping the past two days. Thanks in advance!