What Causes Fever And Headache After Drinking Alcohol?

I had 4 micro beers on Friday night...woke up sat morning feeling like I had the worst hangover in my life ...as if I drank straight liquor all nite instead of just 4 beers. Had horrible headache.....ached all over. Drank water all day (my normal bev of choice)....sat night I got chills and realized my temp was 103.2....took 4 Advil and went to bed. Woke up 4 times to change as I was soaked in sweat. Next morning felt better...but still not quite right....around noon...started to get chills again....took 4 Advil ...and laid on the couch all day....which I normally don t do. Chills went away until 10 pm last night...took 4 more Advil and went to bed. Woke up once over night to change due to sweat.....woke up mon am feeling about the same as i did Sun morning....took one excedrin as i still had a headache...(i never take more than one at avtime if i take it at all)....around 10 am....got the chills again...took 4 Advil ....and chills went away. Chills came back at 8 pm this evening...I still don t feel great.....but I don t feel real bad either. I still have my appetite ...and I constantly drink a lot of water...as I said...it is a beverage of choice. I am 53 male in good health 6 1 and weigh 189.... Been working out regularly since dec 13...I am in very good health overall. Only medication I take is 20mg Pravastatin for cholesterol....I would be described as slim. I also take Flonase occasionally for allergies...and I usually take a 81 mg aspirin daily....although I have not taken one since sat because of the Advil intake. I have no real pain anywhere....have been peeing normally....bowel mvts have been normal. Issue now is I just peed and it was a very dark clear brownish color. I have not had anything really different than my normal diet ...only thing I have been eating since sat that I normally don t is Greek yogurt. So with all that.....can advil cause my pee to become dark ....or do I have an infection somewhere ...ergo the up/down temp swings?