Recently i've been getting sick of my food

For some reason I have been randomly getting sick of what i'm eating while its in my mouth and I have to spit it out.  I never did  this before and I usually eat a lot. Recently though around the end of the month we have run out of most of our food and all I have to eat is the same old things, could I just be sick of the same old things?

It mostly happens with bread. Its happend with, eggs with bread, tuna sandwich, cheese crackers, and some other things. It doesn't happen with candy or junk food so far.