Went to the gym yesterday for the first time in 6 weeks. I did a very easy workout, mainly upper body with a few lunges and squats. I went very easy. Last night I was exhausted, fell asleep at 8pm. Today I can hardly walk, sitting on the loo is agony and it took me 10 minutes to get down the stairs. I didn't pee all day then this evening I had a hypoglycemia attack (not diabetic). Im 51 years old and quite fit. What to do? Anyone ever experience anything so severe? Any way to recover quickly? I took ibuprofen with no effect whatsoever. Help!