Feeling like death!

Louise
So I'm about 13 weeks this week, I'm not sleeping and tossing and turning all night is playing havoc with my back and hips. I have constant headaches throughout the day so try to avoid caffeine or too much of it. The nausea is still in full force and eating is very stressful as I just can't stomach much food. 
Anyone else not enjoying pregnancy yet? 
Or anyone have any tips for anything above as I'm taking so much time off work at the moment but working a 12 hour shift on no sleep and headaches and back pain (in a call centre) isn't ideal!