my Mother is having some pretty constant pain on her left , front side which only began in the last hour or so. She has other health issues and is almost 83. She s concerned about appendicitis. It began after she had her dinner, she s in n assisted living place. How long should we let this kind of pain persist if it doesn t get better, or maybe worse, in case it s her appendix? She s never had any other organ issues, but treated for high blood pressure, 4 heart stints, anxiety issues, and now some short term memory problems. Thank you!