I was diagnosed with an acute sinus infection, sinusitis, and upper respiratory infection about 2 days ago. The doctor prescribed me amoxecillen 500 mg 2x a day. and also some coughing pills 3x a day. Im slightly fine during the day. It is very hard for me to wake up, i have trouble remembering things and concentrating, one minute im cold and the next i am hot, my stomach is constantly upset, i have random headaches and when they come, they hurt alot and i become very tired and dizzy and very disoriented; like im on a loopy drug, also i am constantly tired and for some reason i cannot handle dairy or juices. is this becuase of the medicine?