I’ve been feeling really vulnerable and my sex drive is through the roof why?

I’m(19f) getting older and things in my body are still changing, blah, blah, blah. I get it. But this is actually concerning me.

I don’t want to get pregnant. I don’t ever want to have children. But I feel like my body is trying to force one to happen?? If that makes sense.

I’ve been feeling extremely vulnerable and for some reason, I’ve been taking things extremely seriously lately. But it’s only during ovulation and it goes away. Including how high my sex drive has been during that time as well.

The crazy part, I’m not even a “vulnerable” person. But this whole “alter ego” thing is really pissing me off. Like I don’t even want to have sex sooo wtf am I suppose to do? Like I use to crave sweets and whatever else I can put my hands on, but now it’s just… sex?? Idk. Do I need to work out more? Or take some pills or something or is this natural?