Need baby help

Sy

Hi all... my almost 7 month old has been sleeping through the night beautifully but last night and tonight she has been tossing and turning, waking up every 2 hours sometimes every half an hour... will not go back to sleep without a ton of effort on our part. She has bottom teeth but no top and I can't feel any coming in... I'm desperate for it to go back to how it was, any help, tips anything to make this easier?