Do cats get over being traumatized from loud noise? loud mach. petrified her & now she wont leave the bedroom?

I had my carpet cleaned today & not knowing, the loud noise scared her to death. she had been in the bedroom ever since. she wont come out, eat, or play. she's just backed into a corner and wont respond to anything! Im really worried about her. I've never seen her like this before! She had been in there about 9 hrs. I hope someone will give me advice or tell me she will be fine.