I got sick on 1/21 I went to the doctor, I was starting to see ye...

I got sick on 1/21 I went to the doctor, I was starting to see yellow phlegm every morning for the past 3 days. The next day I was really messed up. My chest started to hurt and I was all congested, accompanied by lots of phlegm and loss of appetite. I called the doctor and she ordered amoxicillin because it works better for me. She wanted to order zpack, but I was reluctant because in the past I have gotten yeast infections from taking it. I felt worst with the asthma, chest congestion that I just wanted immediate relief. By the 3rd day, my throat irritation began, so I went to the emergency room. They order zpack and prednisone and as a precaution gave me a pill for a yeast infection. I started both meds and by the 4th day, the chest congestion was clearing and it was the first day I started feeling a bit better. I went back to the doctor, but I went back and still needed a treatment in the office. I was making a turn for the best. I finished the zpack on Friday and by Saturday, I was noticing a tinge of pain in my left side on Saturday. By Sunday, this pain was constant and stabbing accompanied by a yeast infection. The pill did not clear it up completely yet. Monday, the pain on my left side was unbearable, so I took a Tylenol which had no effect. So I went to the Emergency Room again and now they did an exam, touched my side and ran a ct scan, chest xray and blood test. Get this, the results showed that I have gallstones on the right which were not causing my pain, a UTI and possibly passed a kidney stone. They gave me morphine and a nausea pill. Ultimately, they said they do not know what was causing my pain, so they gave me levaquin for the UTI and hydrocodine for the pain. I know the UTI came from not drinking enough fluids, but I would like to know where this pain is coming from. For Tuesday and Wednesday after leaving the ER, I could not use the bathroom with a bowel movement. I took a laxative today and used it fine this afternoon, Now my right ear feels like I have to swallow to open it. but the pain is still there and without the hydrocodine, it is unbearable. I have never had gallstone, kidney stones or pain like this. I called the doctor today and will see the doctor on Friday. This pain is unbearable, but the chest congestion, throat irritation are all gone. Why are the side effects so severe for a medication that seems to heal immediately.