So, friday night I began to feel a wierd discomforting feeling in my lower right abdomen. I was playing basketball and tennis earlier that day and prior to friday I was working out on a consistent basis. I am 18 years old and in good health so this shocked me. I noticed on saturday morning some mild pains in the same spot, I went to go play tennis that afternoon and felt the pains again. Then, I played basketball later that day and felt nothing but shortly after the game I felt the muscles in my lower right abdomen tighten up again. It is now sunday and I have decreased my activity and feel very little pain. I do notice a little bit of discomfort whenever I flex my ab muscles, so I am unsure if this is the beginning of appendicitis, a pulled muscle or a bacterial infection in my intestines. If anyone has an idea of what it is, please let me know.