Epsom salt bath for 15-20 mins
Massage the crop all the way down to her belly area, pushing downward
If truly eggbound, after the soak squirt a few drops of olive oil in her vent and place her in a dark quiet and warm room
Crush some tums and mix it with water and give it to her (carefully if in syringe, look up correct way to do that please)
Do this twice a day until egg comes out
You have only a few days before this becomes serious
If shes not eggbound, I recommend just isolating her and giving her rooster booster and love