Amoxicillin and feelings

Horrible experience with amoxicillin, which was prescribed for a nasty sinus infection. Major nausea, fatigue, feeling lightheaded and dehydrated. All I wanted to do was to sleep. Missed 2 weeks from work. The nausea was completely debilitating. But curiously, get hungry at the same time was feeling nauseated. When I do get some food, I have to force myself to eat it. Also had major headaches. Got sort of paranoid that something else was seriously wrong with me!
Have been off amoxicillin for a little over a week. Feeling VERY depressed and hopeless. I want so bad to get back to my normal life, but it is like I have no energy or desire to push on. I have to literally FORCE myself out of bed and to work. Very concerned here and do not want to have to start taking an antidepressant. Does anyone know how long these effects will last or what I can do? Doctor gave me an additional prescription for Cipro, but I am afraid to take it because I feel like I am trapped in a vicious cycle and these feelings will only get worse. I am not used to taking meds!!

Taking a ten day course of 3 pills of 500MG per day. I had insomnia the first couple of nights. Some stomach problems and diarrhea. It is now the fourth day and I've been incredibly depressed and experiencing feelings of apathy and lethargy all day. Mood swings throughout the week; uncharacteristic short temper; general feelings of unhappiness or uneasiness.

Also, severe headache that lasted for the second and third days - hurt so much it woke me up several times throughout the night.