I have an 8 week old baby who is exclusively breast fed.
In the early days i had so much spare milk it wasnt funny... i leaked about 1oz per feed (into shells ; 10oz ish a day!) I had donated about 5 pints to SCBU (as my freezer was full) not to mention the stuff i spilt etc etc
anyway since she was about 3/ 4 weeks i expressed using my medala swing every morning. (I had herd dripped milk didnt contain as much fatty goodness so wanted some "proper" milk just in case)
Some nights she would feed for hours in the evenings and i would top her up with some of my dripped / expressed milk.... all fine
2 weeks ago (after 1 eveing where i fed her pretty much constantly from 5pm - 10pm, and had enough / felt like a cow / was resentlful of the fact i could do nothing all evening (& looked after her all day etc etc) we decided to give her her whole 6.30pm ish feed in a bottle (6oz) which she has been having since.
all was fine and i continued to use my medala swing, and express while she was being fed her bottle by daddy, as well as first thing in the morning...
then a few nights I was too tired to dream feed (so i didnt bother she slept til 3am) and expressed again last thing too
all was fine, i was getting 8 - 12oz of milk per day.
I felt like my swing was being over worked so i have invested in a medala freestyle.... a hospital grade, all singing / dancing hands free double electric pump, which i got on Monday.
(I also felt i hadnt been getting quite as much from my swing as id used to)
since then i have barely got more than 2oz of a breast in a session, normally nearer 1oz
. Today, with the freestylei have got the grand total of 5oz of breast milk 
I cant imagine why it has dropped so much.... even 1st thing this morning when my breast felt so full i thought it would pop i got less than 2oz. (would have got 3 - 4oz with the swing i reckon) (my friends report getting 6 - 8oz 1st thing with their pumps.... why cant i?)
Im fast going to run out of milk i think.
also for the past 3 nights my daughter has has a 6oz bottle for her dream feed too (I have been in bed early so had much needed unbroken sleep until 5am
) but im not expressing enough milk to enable this to happen now 
i dont know what to do or why.
(I eat very well and drink loads and loads and loads and loads)
any ideas?