Chances of the infection by the same strain is Less likely May be some other strain Relax. Take it is a normal fever,go for antibiotics and paracetamol and anti histamines

It totally depends on the immunological capabilities of your body. Generally, when you get infected and it gets resolved you body develops a passive immunity and the antibodies protect you for a significant amount of time. If your immunity is low at any point it can affect you again. Consult with proper history for better management.

Yes. Infection differs from symptom. You can anyday be re-infected, but how bad will the clinical presentation be will be dependent on the immune status of the body then. But majorly, it hasn't been that bad with re-infection in majority of the cases, but if a muyated virus infects you the clinical presentation might be bad.

Can help you, kindly provide me detailed history for proper diagnosis and further management