What Causes Soreness In The Arms And Severe Lower Back Pain?

About 2 weeks ago my upper arms became so sore and lifting my arms caused pain. I have spasms in them if I move them a certain way. My lower back feels like knives are stabbing me, about 5-6 inches below my waist. It moves from one side to the other. I am normally an energetic person, but for the last few weeks have had a lot of fatigue. I also have been on a z-pak for a chronic cough, that started after my husband had a bout of ? Bronchitis. I did develop a parasite this past summer, and bowels have been different ever since. This is all strange for me! I feel yukky, and I m not sure what to do, or who to see. Thanks, Carla