Cat went missing for about 3 days shes back but meowing a lot. Why is this?

Hi my cat 3 years old went missing for 3 days shes back and I'm delighted shes ok we gave her food and lots of strokes but shes seem to meow when we (me and my mum) aren't with her like she doesn't want to be on her own I know shes not herself. Will she get back to her normal self?. Also as soon as she came back she wanted to go out again straight after only in the garden I think she had a sleep in the garden cuz shes very tired.

Thanks