Ironically many of those who dissed the Lonely Planet admitted to having sex with prostitutes without a condom on a regular basis. Seeing a doctor is best. Having none around or not having a doctor that speaks English is not so good its up to you. There were a record 482 killed and 30,000 injured during this years Songkran Holidays. A Bangkok Post columnist said it was the bloodiest Songkran ever.
Many foreigners fall in love with Thailand and wish to stay for a while.
In doing so many take jobs as English teachers that are listed in Bangkok's English language newspapers. If you don't have a work permit this is illegal. As noted on your passport it is illegal to work in Thailand. Teaching English and drawing a salary from Thai English school is just that. Make sure that you have a work permit before starting the job.