Hi I was in Bali while being around 6 months pregnant. Think the precautions that you would be taking is fine. I suppose if you patronise proper food places, it should be ok. If you are sun tanning, then be sure to put on sun block. I forgot hahah and so I had bikini tan marks on my chest for a long time LOL! Became conscious of it each time as I breast feed my baby after that hee hee. Its slowly fading now.
Enjoy your trip!