So my frequency is normaly about 7x per day drinking 1.5 - 2L or water. - not too bad right? But my volume is rarely over 300ml. :s

I once got it up to 350ml but I felt I was going to vomit.

See my problem is, if I go when there isn't much urine in there I get like bladder spazm, and if there is too much (Ie over 350) it just shuts off completely then I have to sit there for about 10 mins after peeing a few drops and the rest will come out.

Any ideas?