Why is my head making me go crazy ?

I’ve had headaches for a very long time. My doctors have just given me medicine, I never really thought anything of it, because the pain wasn’t unbearable. But, a few days ago, I had a migraine for two days straight. I thought this was weird, cause my headaches usually don’t last but an hour or two. And ever since then, I feel this unbearable pressure in my head. It feels as if the insides of my head are trying to expand out. It doesn’t really hurt anymore, just a lot of pressure, and it makes me feel kind of dizzy. Also, for the past few days I’ve been having this, my sleeping patterns have majorly been off, I stay up all night, sleep during the day, wake up, go back to sleep, then wake around 11. And I feel as if I’m going crazy, my anxiety is bad, and my mind is racing. I’ve also been seeing weird stuff. Anyways, my mom promises me it’s just sinuses. I can’t even go to school. What is it?