Nausea and work

Hannah • Pregnant with #2 - baby GIRL- EDD 8th October 2017. Already have little boy who is 2 1/2yrs
Hi ladies. I'm 7weeks3days and my nausea is getting worse and worse. I'm worst in the evening and in the night between 2am -4am but it's making me so tired at work. I don't know how I'm going to cope with this for 5 more weeks at least. Any tips???