Confusing...

Backstory:

LMP was April 2nd, and then had my IUD removed on April 12th. Thought I was pregnant at the beginning of May, but all tests were negative. Missed my period this month (was supposed to start on May 4th) but just assumed with the IUD removal that it's stalled.

Today, I've noticed some light discharge when I wipe (pink/brownish). Nothing ever in the toilet, just on the toilet paper. It's not heavy by any means, and no cramping to indicate my cycle.

For the record, I have no clue when I would have ovulated this month, but I'll include my Glow chart for reference. If this is implantation bleeding, it would line up with the dates we had sex.

What are your thoughts?

Should I wait a week and test?