My cockatiel flies away
I got one cockatiel about less than 2 weeks ago. She is randomply screaming, I checked if she was fine and I also checked her food, water, cage, etc.. Everything was fine. I thought that maybe she wanted attention, but everytime I went near her, she gets agitated and flies away from me, in her cage. I tried spending time with her, I tried giving treats but she flew away everytime my hand got near. Once, I brought my hand near her from outside the cage and she tried to bite me. I dont know what to do, please help.