Hi I was diagnosed with lyme after a long time of getting misdiagnosed. After starting Doxycycline, I felt really bad one week in and by week 3, had to stop it. I thought my head would blow up as the pressure was getting that intense. So, after taking a week off, going back on. How do I know this is really a herx? The flu feeling, the head pressure, the increase in pain everywhere etc...I am concerned that maybe I just am having side effects of the medication and not really a herx. The doctor says to hang in there as feeling awful is normal but wow, this is tough. Help appreciated.