I have been sick for several weeks. prescribed amoxicillin for a possible sinus infection. finished the prescription and still sick but now it is more congestion and mucus in my lungs. having difficulty in coughing up the mucus. extreme weakness and some headache and body aches. went back to the dr and tested positive for strep. prescribed penacillan and have finished that prescription . and still am having trouble coughing up mucus and have extreme weakness and night sweats. I am concerned that it may be pnumonia