Post pregnancy fluid problem

Hi,
During the last trimester of my pregnancy and esp in the last month I had terrible fluid retention all over but especially in my arms, legs & feet. It hasn't lessened at all since the birth of my baby 6 weeks ago. The pain in my feet and ankles especially is excruciating and like walking on knives and burns. I pretty much have to wear support stockings all the time, but even they dont seem to give much relief.
I've had every blood test, scan etc under the sun but my doctor cant find anything conclusive that might be causing it and has given me no solutions that might help fix it.

Also I've had terrible trouble breast feeding as it seems all the fluid that should be in my boobs has gone to my feet instead.

I'm just about at my wits end about it and seeing as the b/feeding really isn't working despite taking Domperidone for the last nearly 3 weeks, I am about to just ask the GP to give me diuretics and be done with it even though they will dry up the little milk supply i have.

I'm just wondering if there's anyone else out there who might have had similar extreme fluid and if they got any relief from the tablets or how long it might have taken for the fluid to go away??

I just feel so completely debilitated at the moment and am struggling to do everything I need to take care of my bub, who's time with at home I just want to be enjoying not feeling like this!!

Many thanks in advance!