Nausea

Kayla
OMG so yesterday, all last night and now I have had nothing but bad nausea... I keep reading some women have nausea right through their pregnancies or at least 18-25 weeks.. I'm only 6 weeks in.... Haven't actually been sick but feel sick, tried eating toast this morning and couldn't... Am eating crackers at the moment seems to be the only thing that helps me... 
Anyone else have some ideas??? 
I work 6 days a week averaging 5-8 hours each day, I can't afford to be feeling sick everyday lol
Any tips would be appreciated..
Thanks girls