Implantation?

For about the last 7 hours today I had brownish pink spotting only when I wipe. And only left a few spots on a pad. I thought it was a period at first but it’s practically like nothing. Usually my periods have bad cramps and heavy heavy bleeding. There like four spots on the pad and that’s how it’s been for about 7 hours with no change. No cramps either. Just slight nausea, and very sore boobs.

Period isn’t always on time so it could’ve started anywhere from 23-27th and still be normal.

Maybe I ovulated later than expected?

I didn’t use opks, just went off of CM. I’m not trying but I’m not preventing.

Is it worth the test? Also when should I test?