I've been having burning pain during sex with my boyfriend. It hurts during entry, but not during sex with the burning returning for about an hour after sex. I recently just self-treated for a yeast infection caused by antibiotics from a UTI about a month ago. We've only been having sex for about 2 mths and before that I haven't had sex for over 3 years. My boyfriend is also rather large down there. I've never had the problem before and I'm not sure what to do about it.