My mom always gets mad at me when she is eating and says quit badgering me and your so annoying?

and she gets so angry at me and i try to ask her what the problem is and tell her to calm down and then she tells me, QUIT TELLING ME WHAT TO DO in a loud voice i dont know why she gets so mad at me when she is eating... and i also think that she does not have enouph pationce for me