What is wrong with my cat?

Okay so my cat is always so awake and i don't even remember the last time i actually saw her totally asleep except at night! and today shes laying down in a chair and i go to pick her up like always but she starts to growl and meow like she is in pain. and all she's doing is laying around and falling asleep. i barely touch her and she moans like she's in pain and deifnitely keeps falling asleep which is so not like her... i'm worried about herr. any idea whats wrong?