Spotting into period

So I’ve been spotting for a little over a week... and I’m starting to wonder if I should be more worried than I am.

Background info:

I’ve been on the pill for several years now and this is the first time I’ve experienced any spotting.

I had my period as normal last month.

Last time I had sex was July 5th. He wore a condom even though I was on the pill - for my own piece of mind.

Spotting starting Sunday July 7th. Maybe once or twice a day I would wipe and there would be a little spotting. Nothing pad or liner worthy. It varied in color a brighter red to a dark brown like it would be at the end of your period.

Today it seemed a little heavier - like it would be for Day 1 of my period.

My normal period would start this coming Thursday (July 18th)

Any advice what I should do or what would have caused the spotting in the first place.