Dont know what to think

Just a little worried. So i had my period on the 23 of august and it went off in a duration of 5 days. This morning around 1 something. I notice light brown blood when i wipe. So im thinking its spotting. As today progress ive notice the Brown blood is getting dark, its still brown without a sight of red. So I'm believing that my period is coming back on or something i don't know. I have pcos so should i be alarm by this or just dont over think it and wait a few days to see... Please feel free to comment anyone???