Hello and Welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice. Yes, you should definitely consult your doctor. Since you are on oral chemotherapy drug, possibility of immunosuppression is more. And hence you are at risk of opportunistic infections like viral, fungal, parasitic, bacterial etc. And all these can cause fever with chills. So consult your doctor for blood reports for the diagnosis. You can take aspirin for symptomatic relief. Hope I have answered your query. Let me know if I can assist you further.