Sick 24/7

I have been feeling really sick lately. I'm nauseated but I haven't puked. I seem to be sleepy all the time like I can't get enough sleep. My throat feels like there's something stuck in it, and it's making me even more sick at times. I have random excruciating pains in my left leg and sometimes in my left boob on the bottom and moves to my side. I have lost my appetite completely. I can't go back to the doctor. Any other suggestions?