My 1 year old female cat who I think might be pregnant has been acting strangely today. She follows me around constantly and has been meowing with a low grunt like meow like she's hungry but when I feed her she doesn't eat. She also has been trying to take me to place under or behind the couch and a closet in my bedroom. She also hissed and took a swipe at my dog for the first time. She is right now rubbing up against my ankles. What gives??