Hi, i donated blood today if it is linked, but coming home i had sulphur burping then frequent gases and later a sudden fever with weakness?

Probably coincidence: The most common immediate side effects of blood donation are lightheadedness, faintness and weakness. There may be some fatigue for a week or so until your blood count returns to normal. Unfortunately, I think you have come down with a stomach or intestinal infection. You can contact us again for more info if you like. Dr. Anne.