monday, a friend of mine woke with pain in her knee and it had become swollen. She had not injured it in any way previously. She was also extremely cold and when she took her temp. it was 101. something. Her doc has run a series of blood tests and there is no infection. There is fluid in her knee that may have to be drained and the Lyme disease test in not back yet, however, since monday her temp. has been 96. something and the docs office seems very interested, yet perplexed. This to say the least, along with the borage of phone calls from them are unsettling. please help...what is this? she is in a LOT of pain.