All i want is junk!

Al
I grew up active, on veggies , salad and meat. 
I am 3 months pregnant and veggies make we want to gag. I only want to eat crackers or fatty salty foods and to top it off i am so exhausted the only exercise i get is my dog walks.
   Will this pass??? I am so scared...but i legit can't help it or control myself!!