You should be fine in Bangkok and the rest of Thailand. I've been there many times and will be there again in this winter. I've noticed that Thai people are one of the friendliest people on earth and they treat foreign visitors very well. To me, hookers in Thailand are very safety conscious and they always use condoms. Majority of condoms sold in the world are made in Thailand anyway.
Hospitals, doctors and nurses in Thailand are very good and probably one of the best in the world. I've seen so many westerners and middle easterners go to Thailand to get treatments there by Thai doctors and hospitals. If you may get sick there, then you should be fine and treated well by the doctors and hospital there paying very little fees to the hospitals comparing to a hospital in the western / developed world.
I'm not a white person though... so I am very comfortable when I go there. However, I do notice that many Thai girls like the westerners so you may be treated specially like a king over there if you are a white man. Many of the Thai girls don't seem to enjoy the company of the South Asian people such as Indians which I don't blame them considering that Indians always bargain for everything. I frequently go to the massage parlors there and many of them are big places and big buildings with lots of lights in front by the streets which you can notice them very easily. I feel safer by going to the massage parlors because they are big places and run professionally by the local companies and not run by pimps in a small go-go bar which many people mistaken as freelance....
Foods there are good. I've tried many food there. My favorite food places are the food courts in the shopping malls because you have lots of varieties to choose from in one place. Price-wise, foods in the food courts tend to be less than in a full-service restaurant. Most of the time, I spent within $3.5 for a meal in a food court including a soft drink or Thai ice coffee / tea if you can eat local Asian / Thai foods in a food court. Weather is usually hot there even in their "winter" time when it's still very hot for me. So eating meals in the food courts in the A/C environment inside a shopping mall makes me feel good while eating without sweating in the heat as you're eating outside with the street vendors.
Have fun there....