Baby won't take a bottle

Brooke
Ladies my 7wk old whom I BF has always had a bottle once a day from day one and never an issue. The past few days she refuses to take a bottle and I don't know what to do! 
She cluster feeds at night so I'm feeding her basically every 30min and she is feeding not being comforted because my breasts get heavy then empty at each feed. 
We use advent bottle and have both the classic and natural teets and have tried giving her a faster flowing teet and still nothing she just doesn't latch on.
Any suggestions on other bottles to try? Has this happened to other mums out there?