<human>: This is a throwaway account.

I am a phd student, about halfway through the program. I feel completely overwhelmed, frustrated and helpless. My project is not yielding any results, I am out of ideas what else I could try and frankly, I just don't care anymore. I would gladly take any other job if it just meant I didn't have to go back to the lab, but in my country and in my field you cannot find a job with a Master - entry level means phd.

There's a bunch of trouble with coworkers and my supervisor is so swamped with work he has no time to care about our projects or our problems. 

I am scared about the future, I don't know what to do. Without the phd my whole education was for nothing. Thinking of the lab or my project makes me nauseous. The voice in my head is constantly telling me what a worthless, useless person I am. I have no energy left to do anything and even if I try and force myself, my inner voice just tells me everything I do is pathetic and useless. Sometimes I even start to think about how easy it would be to just end it by jumping off the roof or something. I would never do that, but it still scares me.

I really don't know what to do. I wanted to be a professor since I was a little kid, but now I just want to quit science and never go back. Any advice would be greatly appreciated.

Can you provide a brief overview of the text?
<bot>: Constant frustration and lack of any support with phd project is making me feel worthless. I consider quitting and don't know what to do. Please help.