help pertaining to a female cardinal

I have a female cardinal that goes fron one glass door to another trying to get in. She has been doing this for over a week. I am desperate to help her. What does she want? What can I do for her? Thank you for any advice to help this poor thing.

She is probably fighting her reflection thinking it's another Cardinal. I have not had this problem but know a number of others have so I'm sure they will be along with some suggestions.

Not a lot you can do until she give's up, maybe when she has egg's to sit on and food to catch she will forget about it.
I have a male Cardinal that loves my truck's mirror, but he also does the same thing to my neighbors window. It's just a territorial thing.

thank yo so much for your response. I don't think it is a reflection problem because she does it all throgh the day. wh at she can see would be changed many times over. I have even drawn the drapes and she is still there.Her determination and persistent trying is what has me so concerned. thank you Burd_Fotos for yor information. that does make me feel better. I will keep checking to be sure I don't miss some way to help her. Again thank you both, Katherine999