yes had this happen with my dd, at the same age we got rid of the dummy, best thing we ever did.... things improved right away... we went from replacing dummy overnight every 45 mins to getting a few solid hours sleep... and when i say we, i mean i, my partner slept soundly!!

she was still up and down with her sleep but definitely noticed a difference when we got rid of the dummy and it was a real relief not to be watching the clock for the 45 minute mark so i could run in.... less stress and haven't looked back!

good luck.