Is my gerbil okay ....???? ....?

since nala ( her little frienddd) died, she hasn't hardly eaten anything, is biting me, wont take food from me and runs away like she is terrified at even the sound of my voice, today she had been chewing vigorously at the bars and wont stop digging at the corner of her cage and making loud squeakingng noises. is she ok? or is there something wrong?