I know this is an odd issues, but any help would be appreciated!

I have heard that when you pump, you should pump a minimum of 10 minutes, max of maybe 20 minutes or when the milk stops flowing.

My problem is that after 20 minutes, my milk is still coming out. Granted its a few drops at a time but especially with a little massaging its still coming out. I am afraid I am never really emptying my breasts with the pump but I can't sit there and pump forever (I've only ever gone to about 25 minutes).

Is there any way to speed up your pumping session so I could get as much out as possible in 15 minutes or so? For example, this morning I pumped almost 2 ounces in 5 minutes and then another ounce in the next 10 minutes and less than half an ounce in the last 5 minutes (I stopped at this point because I had to get back to work). It definitely slows down but never stops coming! I would love to get as much as possible in 15 minutes. HELP!