Extreme Fatigue

It's been 6 weeks since my hysterectomy. I am so tired by 5:00 it's not even describable. It feels like I could go and STAY asleep. Usually a 10 minute nap when I feel like this gets me going again for the rest of the night. Doesn't even phase me now. Honestly, I am going crazy. I think my husband is beyond sympathetic. I'm beyond sympathetic. I need to get any energy level back. I have a 6 week check up in two days. I'm going to mention it to her. Hopefully she'll have an answer.