It seems you might be having some residual respiratory infection. I hope you are sure of not having any recent travel or contact history because we are now facing the pandemic situation. If yes, then you should immediately contact the nearby Government Hospital assigned for this purpose. Otherwise, we have to think of any other cause like malaria as it might cause alternate day fever. Is your area malaria prone?
Next Steps
Please consult a physician for further investigations like
CRP, MP, Chest X Ray etc. if needed, final diagnosis and further management.
Health Tips
I hope you are taking some antibiotic alongwith Betnesol