i am going through exacually the same thing , we're about to hit 7 months and this has been going on for 5 weeks .
like you i have tried everything , even co sleeping and trying to introduce a dummy . we all ready have 11 teeth so yes it is possiable teething but she has been handeling this well .
we have a similar routine to yours as well . so maybe its just a wonder time , but its bordering on me going insane with lack of sleep . my dd is waking every hour through the night .

i hope somthing changes soon for both ours & babies sake !