Hi. I am a 21 years old female. I have always been energetic and healthy. I just got back from 3 months in south America. I felt unwell almost the whole time I was there and continue to do so though my symptoms have changed. I do not know if what is wrong with me is something I picked up there I.e a parasite, disease etc... Or an unrelated by subsequent ilness. I have a number of symptoms. I was treated for giardia a couple weeks ago and my horrible stomach cramping and.nausea and chills have done away. I got a urine analysis, lab work and stool samples done. Everything came back picture perfect. Here are the symptoms I'm left with: intermittent low grade fever (it was 99.9 when I went to have my blood drawn ) headache especially in the base of my neck and behind my eyes, burning and.aching below my ribs especially the right side, sore and crackly joints, stiff neck, sore spots in different parts of my body, bad unwell feeling radiating through my spine to my head, tiredness, fatigue . That's all I can think of now. My general physician has no insight especially because my bloodwork came back clear. Could it be untreated parasites ? Or something else? Any advice? Thank you for your time