I have woken with severe right sided jaw pain. had the same 2 weeks ago. can't tell whether it is upper or lower.

Question ?: If you are asking what might be the cause, there are a number of possibilities, including sinus issues, TMJ, periodontal disease, bruxism, and a tooth issue. Without being able to examine you, it is hard to tell so your best bet is to start with a local dentist to rule out any of the above issues.

See dentist: See a dentist to determine the cause of the pain. We can't diagnose over the internet, sight unseen and without x-rays, especially these types of symptoms.