Could this be ectopic?? Please help

I ovulated sometime around July 25th and my period is not due until until Aug 8th.

I started having very light spotting - brown/pink and then cramping for two days. The cramping stopped yesterday but I still have some very light brown spotting when I wipe. I feel like I’m slightly constipated but there is no pain and I have had a bowel movement and feel relieved when I pad gas.

I looked online and it said it could be implantation but then others said ectopic.

Has anyone experienced implantation like this? Or should I call the doctor on Monday?

Please help, if you can!