Im taking ampicilin. Started with 2 days of doxycycline. Today is day 5 of the amp but i took a doxy and will take more amp and only amp for the next week. Im have not been having chills or herx much anymore so I don't know how much of an effect these antibiotics are having but it feels like theyre helping. I can honestly say each time i take antibiotics my symptoms improve. I have been having slight muscle spasms in my legs again since starting the antibiotics last week.