I went away around 20 weeks with my son and was fine. I would be more careful with food a drink. For example, I wouldn't drink the water (apart from bottled) and wouldn't have salad either as would be washed in the water. I forgot this once when I went away and I got a parasite in stomach, not sure if it was from that but can't be too careful.
I agree, take notes and find out where nearest medical centre/hospital is just to be on the safe side. When I went, in order to be covered on insurance, I needed a fitness to travel note from GP, worth looking into as wouldn't want to be left with a big bill, even if its not preg related, you wouldn't be covered. Could be different with different insurers though xx