I treated for HCV in 2005 and achieved undetectable. However, the last several months I've been experiencing daily low-grade fevers, sweating (I'm past menopause) and the last couple of weeks, headaches. I've been in nursing homes and hospitals caring for my mother and have picked up what my doctor diagnosed as staff infection exhibited by sores on my right arm. I've also been feeling lightheaded. My doctor found nodes on my thyroid. Sound like a mess, right? What could be the problem, please.