Implantation Bleeding Question

Yesterday I thought AF was starting 2 days early but I noticed the coloring was different than normal periods. I read up on implantation bleeding but everything I read said it was too late in my cycle to be implantation bleeding but I’m Clomid (first month) not sure if that messed my timing. My period hasn’t started. I did take a test today and it was negative but I read it’s best to test 2-3 days after implantation. Anyone that had implantation bleeding when did it happen for you?