Teething

FTM here so no clue, my baby’s bottom teeth are coming through, one is cut (I can literally see the gum cut and tooth under) the other isn’t. Once the gum is cut is that the worst of it? Or does it carry on as the tooth grows? Hoping the other tooth will follow soon. Shes not been doing too bad overall but her sleeping at night has gone to sh*t and I’m desperate for some normality again.