And if you genuinely have tried everything, call the doctor and see if you can get admitted to the hospital to get physically cleaned out. It's a procedure where they knock you out and basically dig out the impacted stool. Little kids with encopresis sometimes have this done -- no matter how many laxatives, etc.are taken, if there is a genuine block there, all the liquidified stuff is above the blockage. Sometimes this does require physical removal.
Swallow a big soupspoonful of virgin olive oil (hold your nose if you have to) two times a day, straight. It does wonders for the poops.
All else fails down a bottle of pure cranberry juice chase it with some water and be preparred to be stuck in the bathroom
Try cascara sagrada... Idk if i spelt it right but its natural and wont give you the runs my mom uses it for my grandma who is bed ridden and i take it to help me because i cant push due to my two hernias