Hello Doctor, i have had upper stomach pain for the last 4 days , i took Ranisan (anti acid) for 2 days and now i still have minor stomach pain , im okay . But today the whole day im experiencing lower back pain , (middle not side) , no recent physical exercice , even when i took a nap i stood up again Is it related? i have no severe symptoms i just feel physical lumber back pain and abdomen minor discomfort thank you :)