HI my mom went to the doctor today for a check up on a brown recluse bite from 2 months ago , she was in the hospital for a week over it about 6 weeks ago stayed 5 days . So the doctor said because it's still draining she needed a rocefin shot ever since 2 hours after the shot she started feeling old ,tired ,weak and hard to breath if she gets up out of bed,now then 3 hours after she had to go to bed and now she is freezing had a electric blanket on,house coat and 2blankets and has headache and feels like the flu . Are these side affects or a reaction what do we do please help !!!!!!