Post vaccination

Hi, took my flu vaccine, recommended by KKH Dr on 15th march. Was told that in recent months, mummies gets flu too often, hence why. So it's been 2 days. On 16th I've started feeling more tired and down w sore throat. Today, I woke up w mild fever, flu and sore throat. Asking if this is normal as I've taken vaccinations before and never felt this way. Also, is there any recommended medication that I can buy from guardian or Watson? And usually, how long will these symptoms lasts?