My dog digs on her bed and won't lay down. How do I correct this?

Hi - I have a 1 yr old Brittany and she digs on her bed -most dogs do the scratch n circle and then lay down - but she scratches/digs and doesn't lay down. This is worse when she is overly tired. How do I help her / correct this behavior? Currently if we go to her and hold her paw and calm her she finally relaxes. Thank you

Fluffy dog beds are worse - blankets are better so we just use those. But when she does it, it is almost frantic and she does not just lay down after a short amount of time (like a normal dog generally does). We tried correction with a THAT'S ENOUGH - we tried raising up on the leash (when she was younger and had a leash on in the house all the time) - now the only thing that seems to work is us soothing her and talking her down till she relaxes (about 2 minutes). She would go on for 15 minutes if we'd let her, which I worry would tear up a bed/blanket/carpet. So should I just let her do it till she finally lays down and learns on her own? I admit it has gotten better over time and is worse when she is super tired. Note - she does not do it in her crate but we are trying to give her more freedom and she has no other concerns while out of the crate. Thank you for your time and suggestions.