Why am I so out of it and tired?

I've been dumped with a bunch of stress last week. I have 5 courses, and 2 history ignments to do, world issues country research, math exam midterms on teusday, and english debate on wensday, i think a hard philosphy test is coming, and im so tired lately, i have noo energy to work on it, i havnt done any hw on the weekend, not the fact that i dont want too, its that i cant concentrate and i will incapable, weak, i loose my concentration easily, i tried waking up early in the morning, i cant keep my attention for more than 30 minutes. i just listen to music to relax. i even tried singing today, i love singing so much i didnt even have the energy to sing. i was tired by like 4. its 7 know and i feel pooped. im 18, in grade 12. and i recently felt more unconcentrated and more tired this week last week, and next week. i think its the stress of the load of work i do. because of that i cant put enough energy to study. its seriously frustrating me, because its not a good time to be lazy. like as i type this no energy. i eat like 24 eggs a week. im serious. i ate around 22 eggs this week. my diet is like protein, because i gave up bread for lent. some vegetables, and some fruits, and other foods like pataotes. but i dont know why i feel this way?? even my english teacher told my dad i always look tired. the reason for that is me staying up all night doing hw, because i cant concentare in the day which takes me longer to finish thus i stay up all night. help im sooooooooo tired. and dont say iron, im not going to take iron pills because i just dont want too. i did before.