Extremely fussy

my 8 almost 9 month old is extremely fussy. i’m not sure if it’s teething as she still doesn’t have any teeth yet. I do see two white spots at the bottom of her gums where teeth would be. but they have not came out of the gums yet. but not sure if that’s what i’m seeing either. she’s been fussy at the breast. she breastfeeds. she would cry coming off and I would have to push her head back in (normally she puts herself back on) or finds her way to it. but she’s doing the complete opposite like she doesn’t want it. what are teething signs?