I have had a lo grade fever on and off for a while...but I have fibromyalgia, interstitial Cystitis, many different auto immune things...no antibiotics...I'm allergic to almost everything so I don't take the one I can take unless I absolutely have to. I wouldn't be surprised if I don't have an infection somewhere..my blood count goes up...and down. I'm not sure what they'd MRI...I guess maybe pancreas or gall bladder, ugh...maybe if they MRI'd the belly they would find some scar tissue. If I could just get one of my docs to overlook my current weight and look at their own guidelines to look at the amount of weight loss. OH WELL...my daughter and I are sharing protien powder now in smoothies (she won't eat meat...or anything that is healthy so I've put my foot down and said she has to eat these things each day, and check it off, or she will have to go back on a reg. diet..she's 12) I worry about anorexia with her and she uses my lack of eating to justify hers, (she weighs 93 pounds and has dropped from 104) She doesn't understand the difference.