Hello Welcome to HCM As you are already on acyclovir and augmentin,no need to worry. Complications of chickenpox like pneumonia,bleeding problems,infection or inflammation of the brain (encephalitis, cerebellar ataxia),blood stream infections (sepsis) are common in people with weakened immune systems because of illness or medications; for example,People with HIV/AIDS or cancer patients who have had transplants, and People on chemotherapy, immunosuppressive medications. So,just no need to worry.You take paracetamol for headache.If symptoms worsen like increased vomiting,blurring of vision,altered state of mentation,then you need to consult your doctor immediately. Hope you are happy with the answer. Thank you