On day 4 of Viibryd, I have the 10mg to 40mg starter pack. I was very surprised to notice a change in my mood and energy level by day 2, and so did my husband. I do have some upset stomach issues but my main concern is the insomnia. I have been waking up around 3am for the past few nights and cant get back to sleep. I'm ok with this if it is going to get better but am worried when the dose increases will the insomnia get worse? Has anyone had a similar experience?