Scariest dream ive ever had

Well let me give some background info i guess, for a general setting:
I have a girlfriend that ive been with for 2 years, but she moved a couple of months ago and i dont know when shes going to be back. Meanwhile my ex-gf who ive always felt a little attracted to seemed to like me again (at the time of the dream, I dont think she does anymore).

Also, I'm in my first year of the hardest business school in Canada, and its really stressful and sleep depriving, I get probably 3-4 hours of sleep a night.

So heres the dream as i wrote it the minute after i woke up:

Nov 4 2009 – 2 hour nap
I found out its mandatory to have some sort of heart surgery in my school due to a bug that’s going around. I am sitting with my friend next to me and watching the surgery from the back row of an auditorium because I came late. First the nurse stabbed the patient in the heart with what seemed to be a needle (sedative?) and the patient goes ballistic, seems like the pain is excruciating and he starts coughing out blood vigorously and falls off the table. The nurse then takes a black cloth and puts it over the patient’s mouth and he relaxes a bit, but still throws up. Then the nurse reaches in the patient’s mouth and pulls out what looks like a kidney that is dripping a river of blood. I then see him lying on the bed with two black spots on his body where the knee caps would have been, but now his body is just a blob of flesh in grayscale, nurse taps the two black spots and I wake up
Notes:
I’ve never had a dream as messed up as this, which is why this is where my dream log starts. I woke up alone in my dark room and I felt very unsecure and scared. I also felt out of it for the next 2-ish hours.

Ive done a general analysis with key terms and they all point to me being stressed and emotionally drained.

Analyze this please
Thanks !

Here's my analysis: get some sleep! But, seriously, get some sleep. If you have to take one less class next semester, do it. This is my suggestion. I am just some random guy on the internet, but it's obvious that you are not getting enough sleep.

You need to figure stuff out about your girlfriend. Sounds like you are afraid of getting your guts ripped out, right? I hate nightmares like this. I am sorry you had that. Well, lucidity helps.

But, getting more sleep will reduce your stress greatly, which will in turn give you more pleasant dreams.