Sleep Schedule for 7.5 month old

I have a 7.5 month Old and she has slept all through the night maybe 2 or 3 times. This past week she has not slept well at all. I know she is teething and has TWO bottom teeth already in so I know that probably has a lot to do with it. I give her thing a to chew on, a wet rag, a frozen teething ring to help her cope while she is awake. But in the middle of the night it seems she just can't sleep well. I am the one that puts her to sleep and wakes up with her in the middle of the night. So any advice or personal experience stories would be appreciated. I feel like this teething thing is keeping her from sleeping well, as well as having a consistent schedule. Also, do any of you sleep sleep train? If so what exactly is it and any success?