Adverse effect to paracetamol

This is not correct. Tremor is not an adverse effect of paracetamol (acetaminophen). Common side effects of paracetamol may include nausea, rash, or hepatotoxicity (in cases of overdose), but paracetamol has no pharmacological mechanism that would cause tremor. The headaches Amy has been getting may also be related to the culprit drug causing her tremor. I encourage you to consider other plausible explanations.