I am physically, and mentally exhausted, and I can't sleep. Can somebody please help me with some ideas to help me?

I haven’t really slept since Thursday, and I am probably surviving off of 3 hours of sleep since then. I am tired! I want to sleep! Please help me. I haven’t gone out, I didn’t even go to a party. I was at home all weekend, and tried to get some rest, but it just wasn’t going to happen.