Spironolactone is, in addition to it's use for PCOS, a potassium sparing diuretic so make sure you are drinking plenty of water, at least a litre and a half a day.
If your not getting enough water then the extra fibre will just make the problem worse. Picture cement made without enough water... not nice.
I found that natural solutions were best. I switched to whole wheat bread, brown rice, and whole wheat pasta, cut out most of the caffeine (and missed it soooo much) and ate lots of apples. Just remember to avoid grapefruit juice and bananas, grapefruit interferes with the action of spironolactone and bananas are high in potassium to have when you are taking it.
Hope everything eventually comes out all right. | 
Spiro and Constipation? 
