What Causes Mild Headaches Throughout The Day And Tiredness?

I've been getting mild headaches throughout the day for the last 2 weeks and I seem to be a lot more tired than normal. I just started a job where I get up at 6 AM but I'm also going to be around 10 so that's 8 hours of sleep and sometimes I'm asleep by 930 so I know I'm getting a good amount of sleep but it doesn't seem to help. Any ideas?