Questions about AC

I just started AC last Monday. This is day 11 for me. I had a lot of nausea, a deminished appetite for most of the week. I had constipation and a lot of pain and cramping with the constipation.I also had a very bad taste in my mouth. It was was as if I bit into a mouth full of salt every time I ate something. Does anyone have a solution for the salty taste I am getting when I eat? For the first week I was so tired all I could do was go from the bed to the couch during the day, then from the couch to the bed at night. Is this normal? Does anyone have any suggestions?