Sup guys, so tomorrow im having my exam to enter to unversity. Here in Spain, we have to do some  exams and depending on the marks u get u will be able to enter to a degree or not. 

I want to study odontology, and im very very nervous, it´s not like fear, it´s more like a bad sensation on my stomach and on my heart. I have been bad sleeping for a hole week, stufying 24/7, not talking enough with my parents, not talking enough with my gf, and now im scared, im blocked. 

I need to 10/10 on tomorrow exams and i really dont think i will get that marks, i havent studied enough for that.

This is the situation, im so pessimmist rn, my derealization sensations are on the next level, like i have never feel this way , im constantly thinking im going crazy, like my brain is so hperactivated that my periferial vision plays tricks on me sometimes , making me think that there are things that are just objects. For example i was on the laboratory, and we have like a big tall black machine, i was talking wth my friend and as we were alone on the lab i thought the black machine was someone cause i saw it with my periferial vision and idk i got scared. My brain is like a little bit chaotic rn and is like many thoughts constantly analyzing if i "immagined " something or if it was actually somehting, and im scared i think im loosing my mind slowly, and im worried but i cant feel like fear of that , while in the past i used to shit off my pants of that idea. Im i making sense ? Guys im scared and the worst thing is that i cant be like this before the exam of tomorrow.. please help me , i need u all.