Anyone else?

Is anyone else out there using nipple shields & find they either flip inside out sometimes and block baby's nose, or fall off when baby's little hands get in the way? 
We have to use them (for now) because baby was born preemie and can't latch on without them. My nipples are too shallow :-( 
It's just frustrating constantly adjusting them, washing them and relying on them (although I'm thankful for them as I can feed my LO, I wish I didn't need them). 
Frustrated Mum x