I am an elderly woman suffering from diseases such as diabetes, hypertension, migraines, and kidney stones, among others. However, thanks to Allah, I am able to fast, and fasting does not pose a danger to my health. But I have a problem: I drink a lot of water during the iftar period because I fear becoming weak during the day and having to break my fast to drink plenty of fluids. After the call to prayer, I experience acidity in my stomach and try to expel it from my mouth, but I cannot because I involuntarily swallow my saliva. This has happened to me for many days, almost half of Ramadan, and I tried to fast in Shawwal, and the same thing happened to me. What is the ruling in my case? Should I make up those days, knowing that during my make-up fasts, the same thing happens to me, and I cannot stop drinking water because if I get thirsty, I suffer from headaches?