I can't figure out how to get out of the subway. I got a pipe from when I went through the portal and I found bullets on the steps by the worm. But I don't know how to kill the worm and every time I go into the bathroom there is one door that won't open and I can't figure out how to open it. And I can't find anything else to help me get out of the subway. And I don't know how to get back to my apartment. Please help I'm so confused that it is killing me.