What’s wrong with me down there?

My discharge it’s sometimes non existent, if I do have it it’s a bright white lotion consistency but not sticky. So that makes me think I’m not fertile. My discharge use to be clear and sticky. I don’t know when this stopped happening. My period came on about a week earlier than predicated. A week later I’m getting slight cramps.

I don’t think it’s a STD or anything. No smells, weird colors, itch or anything. I haven’t had sex in 6 months. And when I did I always used protection.