Sorry, I have another breast pump question. I decided to keep renting the hospital one, because I have to come back to England in April and don't want to carry a large heavy expensive one I've bought here in Canada that won't plug in back home. But this morning I fried the plastic bits of my hospital one by putting it in the microwave steriliser and forgetting to add the water. The hospital is closed today, so I sent the husband out to babies r us to get the cheapest hand pump, the medela liberty. I used it once and even while I was using it got shooting pains on the upper side of the breasts (not terrible pains but achy ones) and now, two hours after using it, my breasts hurt all over, really. This doesn't happen with the electric pumps. Is it likely I pumped too often? Too hard? Not often enough? Am I endangering my milk supply by damaging my breasts and would it be better to not use at all until I get the replacement parts for the electric one, or would it be better to keep hand pumping? Any thoughts would be gratefully welcomed. My milk supply isn't great, despite the domperidone, so I don't dare mess with it.