My lg has only just had her bottom 2 teeth come through and she’s 7 1/2 months old. Every baby is different and every baby develops differently. Mines not crawling yet but I know someone else’s baby who was crawling from 5/6 months. Your baby defo has the symptoms of teething I recon so try frozen toy keys or anbesol liquid on her gums or teething powder if you’ve not already
Dentist told us the later they come through the better 🙂
I wouldn’t worry, sometimes the teeth can just shift in the gums before they’re ready to come out. My nephew didn’t get his first tooth until after he turned 1 yet showed signs of teething for months before!