Very anxious dog

My 3 yr old female staffy is refusing to go out for a walk. She has always been wary of anything that bangs like shotguns and fireworks but since this years bonfire night she has got so bad I can’t take her out. I’ve tried taking her out in the car because that’s the only place she will go to but she refuses to get out of the car and if she does, she won’t move. We used to walk for miles every day and if she heard a bang she would run but always wait for me to catch up. I’ve tried various calming products but no change. Any ideas anyone?