I recently acquired a great new boyfriend, who is wonderful in bed. But after a night with him, I was alarmed to see my clitoris had become very swollen and painful. A few hours later, it actually "popped" and some blood came out. Now everything has gone back to normal. Have I done myself any serious harm?

No. This is a condition I have seen numerous times, though it does not appear in medical textbooks. It is called "clitoral haematoma", and it is just caused by excessive friction on the clitoris. The word "haematoma" means "collection of blood". All you need to do is to take things a little easier in future and employ plenty of lubricant.