Implantation or period ( Clomid cycle 1)

Okay, so I was placed on Clomid this last month.

I ovulated on CD 20. 8 DPO I had spotting with dark red blood one time and it went away. I am now 11 DPO and this am I had pinkish red spotting only once and went away. My nipples have been on and off hard since the 8 DPO..

I am suppose to get my period Monday ( CD 35 / 14 DPO ). I took a pregnancy test today and it showed negative.

Has anyone else had this same problem or know what it means?! 😩