it sounds like separation anxiety. you need to make your comings and goings low key. You can leave your pup something that smells like you and also fill a kong as your leaving and toss it to them to pre occupy them. Pay no attention to her right before you go, oodling over her telling her you will miss her etc makes her feel more anxious. Also when you come home say hi but dont go all mushy and stuff. Start too by leaving for 10 minutes and come back then increase your time away. You can also leave a radio on low for her.
She will adjust it will just take time. You can also get another chi for company!! :wave: