Been on antibiotics for about 10 days now. For the last two nights, I have the shakes at night, now during the day. I couldn't sleep last night, because of severe nausea. My joints ache, but I think it's from the antibiotics. Normal? I've never really experienced this before. If I'm hungry, I eat, but then this wave of nausea hits. NO, I'm not preggers! husband had pneumonia last week. Other than going to the docs or to the drug store, I haven't been anywhere to catch something else.