New to this. Got a question

So I'm new to glow. I'm on cycle day 16 from what my chart is telling me. My be and I have baby danced all but one of my fertile days. Today I'm spotting kind of. Only when I wipe. TMI sorry. I'm just confused. My period isn't due for a little while longer, I'm not cramping. I feel like it's any other day except as soon as I ate I felt nascious. Anyone else gone through this.. am I just over thinking the whole thing? He and I have been together for two years. We're ready for babys to happen!