Floating in a murky sea

The last couple of weeks have been so busy. I worked a couple of night shifts and a couple of day shifts and between christmas and new year's eve I didn't sleep more than 3 or 4 hours a night for a week. Behind on homework. Low on money so still trying to work. Riding my bike to work in the snow cause I didn't have change for the bus.
I felt like I was floating in a murky sea, some silly little things making me cry and other important things just feeling flat and emotionless. I couldn't stop thinking about how nice it would be to put my head on my pillow and close my eyes and not wake up for a long, long time.
On New year's eve at about 5 in the morning I'd finally been able to get to bed and my brother Austin woke me up.
"Kiara is throwing up and her stomach hurts. I can't find the tylenol."
Never mind the fact that you shouldn't give tylenol for a stomachache, I told him in a garbled voice that it was called acetaminophen and he should only give her a half pill, not a whole. I heard him a little while later trying to convince her to swallow the pill and I thought, I should get up and go tell him to crush it with jam. Oh, she'll probably just throw it back up on him again anyway.
At some ungodly hour in the morning I got up and drove to the hospital to see my close friend Anna who had been in a serious car accident. I came home a few hours later and helped clean up the house and went out for dinner with my family for my mom's birthday. Then back to the hospital, with my pajamas.
I washed blood out of Anna's hair and helped her with the toilet and other things until 1:30 in the morning. I finally could hardly stand up any longer and I found a reclining chair and collapsed onto it. At 4:30 in the morning I woke up cause she was crying, the morphine had worn off and two broken legs and a broken arm take their toll. I looked at her in the dark as if staring at some strange sea creature in the murky sea of mine. I don't even remember what I said (did I say anything?) I sat on the bed with her until she went for surgery at 7, and then at 8 I left and drove home. I felt sick. I slept on my bed for an hour or two and then I had errands to run and homework.
Last night I'd finally had enough. I'd taken enough advil and tried long enough to make sense of the open pages of my textbook. Everything was swimming in my brain. I called it a day at 10:30.
The most amazing thing happened. I woke up this morning at 10:30, after having slept for almost 12 hours. (Which I never ever do). Never mind the fact that I was late for my appointments today. I felt human again, as if I'd been dragged out of that murky sea and left to dry on the bank until I woke up alive again.
I'm only in my first year of medical school. How will I do in a couple of years when it really starts to heat up?
Do you not know, have you not heard? The Lord is the everlasting God, the creator of the ends of the earth. He will not grow tired or weary, and his understanding no one can fathom. He gives strength to the weary and increases the power of the weak. Even youths grow tired and weary, and young men stumble and fall; but those who hope in the Lord will renew their strength. They will soar on wings like eagles; they will run and not grow weary, they will walk and not be faint.