1. Consult a doctor
until that
Sit on salty (use very small amount) water (very light hot water) in morning and evening.
and try to apply https://www.daraz.lk/products/i121559131-s1037937921.html?urlFlag=true&mp=1
IF you do a MSc then after, if you get struggle with the visa, your only option is a PhD.
If you go for BSc then you can do MSc and extend the Visa for another year.