I recommend you take your antimalarial drugs, at least in the short-term, but you should still behave as if you’re not taking them because where there is malaria there is often also dengue fever. There is no prophylaxis for dengue, and, although it won’t kill you if you get treatment promptly, you will feel so bad you will wish it would.
So, long clothing at dawn and dusk, bed nets every night, tucked under the mattress, DEET spray all the time, and bug spray the room before you go to bed. Do these religiously, and you stand a relatively good chance of not getting malaria or dengue.
I like this one, but really, anything that keeps them out will do. Check them regularly for holes, and make sure they are tucking under the bedding. Take a nail along with you to put into the ceiling if necessary (you can bang it in with a shoe), and some string to hang it.
Get 100% Deet. Don’t bother trying to get something less toxic, toxic is the point I’m afraid. This one is ok, but anything that is 100% DEET or thereabout is pretty much the same.
Pack a spray can of this kind of stuff, and use it around your room before you go to bed. Try to plug holes in the room with netting, and keep insects out, but be aware that they will find their way in. Spraying the room with this stuff gives you more of a fighting chance.