I feel exhausted after school... should i go to sleep ?

ok i work very very very hard on my fitness like crazy im in set 1 in pe with set 1 standards and everything but i wanna show my teacher that i go even further soo over the 3 years until year i am a level 8a in pe and still want to go further and i look terrible after school >> should i go to sleep after school and stay up all night ?or will it affect me in pe if i dont sleep ? remember i amm mentaly fit because i want to be an astranaut when im older i know sounds crazy but its my dream and i know its not a big deal but when i mean exhausted I MEAN exhausted i only focus about my fitness i want something to cool me down and make me have a relaxing time and enjoyment not stay at home all the time for rest after school >> sorry i know its not a big deal but i feel dizzy right now wanna go sleep :/ its 4 pm afternoon by the way