What Causes Memory Loss, Noise In Head And Loss Of Concentration?

last year i woke up feeling weak and when i got to the hospital the doctor pescribed lyrica 75mg 2x a day for one week and later increase the dose to 150mg 2x a day. after i have finished taking the drug i realised my life was in a mess. i ve since been visiting several hospitals for help but i don t seems to get well. I constantly feel weak, lose of concentration, hair lose, noise in the head, memory lose and so many usual things. i later realised the that the medication was for epileptic patients but am not one. i need help am just 28 years of age