Spotting

But the last few months it's been like every 3-3 1/2 weeks. But I still have another week ish for a period, and I'm spotting.. Started yesterday, no need for a pad or liner or anything. Stopped yesterday night, not at all today except once today but it was like (I don't wanna say glob) but almost a glob. Than was done again in a few wipes. It's very light pink. No where like any normal period, even my light ones.. 

Any ideas.?!