Distressed Cry all day, thought egg bound

[mediazeal]

I have a 10 month old welsummer hen, named Cocoa.
She has been normal today most of the day except she has been doing a repetetive 'caw' noise all day.
First time I noticed it this morning was after I let them out (and she practiced her crowing) I found her on the nest cawing
no egg came of it all day
next I found her under a bush doing the same thing
then in the middle of the yard while the others gathered around my feet for treats 20 feet away
when she saw treats she came running
since she is not tame I had to wait for them to get back in the coop this evening to catch her
she was a little easier to handle than she usually is
her comb got pretty dark as I carried her in, still cawing
I don't see anything down her throat
she did eat some treats but is not as interested in food as usual
so thinking this young and very healthy hen might be egg bound I brought her in and gave her a warm bath
I did not feel anything stuck or protruding
she doesn't appear to have prolapse
she cawed all through the bath
and is not in a crate after being towel dried
cawing away
she is obviously in distress
I see nothing wrong with her and feel nothing wrong in her belly or underside or vent area
any ideas?
warm bath was all the egg bound threads said to do so I tried it
help help help
I'm stumped
thanks