My dd is just over 6 months, and I plan to return to work at beginning of May when she will be nine and a half months. So far I have not had to introduce formula and I've got this far so I would prefer not to. Problem is that I have had no luck with expressing. I have manual Nuby pump. Absolutely nothing comes out the few times that I have attempted to use it. If I hand express straight after a feed and after some massaging I can get a steady trickle, but it still adds up to less than quarter of an ounce. Any advice on how to choose a pump or how to make hand expressing more lucrative?