I would talk to your doctor NOW about any vaccines that are required or that he recommends for a trip to Thailand - it would probably be better (though your doctor can confirm) to have them done now when even if you are pregnant, the embryo isn't attached to your blood flow yet, rather than later.
I know when I moved to China, I had needles stuck in both arms and felt like a punching bag for days because of all the vaccines I was required to have. You also might need to take malaria medicine - talk to your doctor about this, because you have to start in advance anyway (both you and your husband) and to see if it's okay for a pregnancy.
Also, think about precautions if you do go and talk to your doctor about them - filtered water is not common in Thailand, so I would recommend being extra super careful to only drink bottled water (and make sure it's a real seal, not re-sealed with super glue), not eating uncooked produce as it may have been rinsed in water, and brushing your teeth with tap water.
I'm definitely not saying to not go - I would! Heck, I might end up moving to Asia at some point during my pregnancy. Just know the risks!