There are many reasons why a cat might meow incessantly and wander around aimlessly, including but not limited to hunger, thirst, being in heat, anxiety, illness, or other discomfort. Here are some specific possibilities:

1. Hunger or thirst: If your cat is hungry or thirsty, it may walk around and make noises to attract your attention and lead you to the food or water bowl.
2. Heat cycle: Cats become particularly clingy during their heat cycle. They may meow continuously, wander around the house, and sometimes even run away from home.
3. Anxiety or stress: Changes in environment, new family members or pets, lack of sufficient stimulation or exercise can all cause cats to feel anxious or stressed, which can lead to meowing and pacing.