 [ Symptoms ] my wife is six weeks pregnant and has a sleep disorder she has a prescription for lunesta can she take it [ Disease ] this can be explained by only 2 possibilitys first is sever cold in knee joint which scientificly increase at night causing sever pain second is panic attack which also show at bedtime no physiological reason is logical your symptoms yet if you have a small degree of osteoarthritis the previous two explainations can increase pain good luck