can nausea be psychological?!

i would never have this problem until a few months ago and it has gradually been getting worse. When I eat it seems to subdue a bit. Now I hate going out and I rather just stay at home nice and calm. I never actually throw up and i never have diarrhea I usually just have this gagging feeling on my neck in the area where it connects to my head. Also when I do something to distract me, It goes away. Can this be psychological? what can i do? i cant live like this