I began 25mg MTX injections 5 weeks ago. I've had fevers along the way however, this past week I can't escape a moderate fever. No other side effects I could say other than these fevers and the feeling like I've got the worst hangover/flu ever the 24-48hrs post injection..joint pain and extreme fatigue. Anyone experience fevers? I was told I can take Tylenol but it doesn't do anything...still fevered.