Recently, my one year old female cat has become very lethargic and has been showing some odd behaviors out of the blue which she wouldn't show normally.
Since the past three days, she has started peeing in random places in the house, and recently even peed on the floor just outside her litter box, despite being completely toilet trained.
On top of this, my cat used to be very energetic, sprightly and active, meowing and hollering for attention, but since the week's start, she's stopped meowing and barely moves around the house.
She starts shivering whenever anyone tries to pick her up (which we could easily do before, albeit with some mews of annoyance) and eats very little of her food.
I've also noticed that she has started hiding under the bedsheets in my bedroom, and under the blankets in other bedrooms as well, which she would never do earlier. I've heard that this is a behavior that cats nearing the end of their life do, which confuses me as mine is only a year old.
She never leaves the house, and has been with my family for a year, without any problems. We've been trying for a vet appointment but it's taking some time. Is this just paranoia or could there be some larger issues with my cat?