Pain In The Left Knee The Pain Feels Like Throbbing

pain in the left knee the pain feels like throbbing pain sometimes in the right part of the knee like a nerve pain. sometimes I feel numb from knee below when the pain is bad. but the shooting pain in the right part of the knee is there. and hurts. I have had fever for several months and then this started. my glands I bit swollen but I don't know If related to this. sometimes I feel like I have a very mild cough ! when my tummy inflame the pain gets worse. sometimes it feels there is no circulation in the knee as I feel cold, but is me because when you touch the knee is not hot not cold it feels normal. sometimes the pain migrate to other knee but the left one is worse .I have xray for my lungs and some inflammation has bee noted. could it be rheumatic fever? could it be oestorarthrits ? could it be fybromaligia ? could it be nerve damaging? don't know