No hunger on Cymbalta?

I’m taking 40mg Cymbalta (duloxetine) everyday for anxiety. Well ever since I started taking it I have no appetite literally. Today all i had was a handful of chips and some vegetables, drank a cup of coffee. It’s 1:30 in the morning and still no hunger. And mind you I ate the chips and vegetables at 11am this morning. Anyone else experiencing absolutely no appetite? I can’t even bring myself to eat because nothing sounds good. I’m not really trying to complain because i am overweight and need to lose about 20 pounds but I’ve already lost 5 without even trying. I am also constipated everyday as well and have to drink coffee in order to BM.