When I moved to CM 7 years ago, I stayed in a hotel in the old city for a couple of months. When I finally got time to look for a more permanent place, I went for a walk and found a nice garden flat about 100 meters down the road and I've been here ever since
Try Piriton, a first generation antihistamine. I've been taking them on and off for years, with no addictive or other ill effects. And at THB20 for 50, they won't break the bank