Worried for my health

Chat where do I post this?

I, 14f, am having a late period this month. I'm worried for my health because I keep having random few-second periods where my heart races and my breathing gets heavy. I also get random periods of exhaustion, even if I'm well rested. My eyes get droopy and my body feels like it's gonna pass out (sleep) until I wake myself up. In this exhaustion period, I slur words and forget basic things. It's like when you're half-asleep.