HI, i am 28 years old and feel like a tingling sensation after urination with fatigue and headeach and feeling hungry, i believe that when i eat my intestine its not getting the nutrients since a long time ago i was diagnose with IBS, all blood test are negative, months ago i had UTI i believe is gone, have to check. I get hypoglasimic if i dont it on time, and my hair is faling thyrid comes good, i am confused why all blood test comes negative and i feel worn out after emptying my bladder and with a urge to eat ? also this has been going for 4 years, one doctor saw my lab test and told me to take B12 he didn t tell what was wrong. There is more but that s it for now.