Teething

My 4 month old has been running a low grade fever for the past 4 days. She has been drooling for the last months and a half. I felt her gums up top and they are hard, I don’t know if the teething are breaking through or are starting too. I e tried cold teething stuff but she doesn’t like it, or maybe it hurts too much. I also ordered some amber beads has anyone used them?