chronic headaches or anemia?

HI

for the last few weeks i've been suffering from really bad headaches so i went to the doctor and he says it's chronic daily headaches but i'm not sure if it's actually anemia because i also get very light headed, nauseous and also get quite shaky and i am always feeling tired and drained even if i had a full nights sleep i wake up and feel like i could sleep anout 10hours but when i try to go to sleep i can't. Just wondered if anyone agrees that the doctor might have it wrong? Getting fed up of feeling like this especially because i work in a busy bar and have to spend 6-8 hours stood up which doesn't really help as you can probably imagine

Any help would be brilliant

Thanks, Grace x