Really Cold Weather in Singapore

Yesterday, it was raining throughout the day and temperature dropped to a cool 25 degrees celsius. I have sinus and am sensitive to cold weather. Thus yesterday I spent almost the whole day sneezing. I slept early yesterday at around 10 pm plus. Normally I sleep around 1 am if I don't work the next day. 

I think I cannot stay in a cold country. I'm the only person at home who don't have air-conditioner in my bedroom as I have sinus issue and prefer to sleep in a well-ventilated bedroom with fan. If haze situation don't improve, I might just install air-conditioner in my bedroom.