Maybe if you ask a local Dr or midwife they will be able to help you out - its probably a fairly common concern if you're in the tropics. In the meantime maybe a bit of citronella on your clothes (you could try putting it in the rinse cycle if you don't find the smell too off-putting) and some citronella candles might be a more natural alternative. Since most mozzie bites are between dusk and dawn if you stay indoors in those hours and sleep under a mozzie net you can minimise your exposure to the nasty little blood suckers. You can also minimise biting by wearing light cloloured clothes and long sleeves and pants and avoiding strong smelling perfumes, aftershaves etc.