Hi! I Have Been Having Pain In My Lower Abdomen

hi! i have been having pain in my lower abdomen for about six days now, and it is moving into my upper abdomen today. it is worse in the early morning hours, and after my food had been digested. Also, i am supposed to be on my monthly cycle at this time but i haven't started yet. i have not had a fever, but i have throw up a few times today. My mother thinks its something with my appendix, but i'm not sure. can you help me figure out whats wrong without going to the hospital unless absolutely necessary?