Morning, day, and night sickness

Mandi 😈💀 • Expecting #2 August '15!
With my first baby I had some nausea, a little in the morning but more in the mid afternoon, but it would usually go away pretty quickly. At just over 3 weeks though, I am already so tired of feeling nauseous all day long with #2! Every time I stand up from laying down I instantly feel so sick. Crackers help a little, but does anyone have any all the time sickness tips? Anybody else feeling horrible and pukey too?