14 week old ds has always refused a bottle. I have been trying with expressed milk since 7 weeks. Family members have tried without me around. We have tried Tommee Tippee closer to nature and the funny nipple shaped Nuk teats. He just doesn't seem to understand what to do with it, starts off kind of chewing on it and then gets distressed if you persist. He is a very sucky baby and I've also tried several different dummies with no success. He breastfeeds like a dream but sometimes I feel like he uses me as a dummy and I'm keen to have a break for a few hours and go to the odd exercise class. Any tips gratefully received!