I suffered from extreme constipation for several years. It lead me to a lot of health problems.
I have tried many things. I think the best thing now would be to get colosan of Oxypowder and try to get things moving. But I do not know about the effects on the kidneys. I would call the company to ask them if it is O.K.
Drink pleny of WARM water, and of couse if you can, get a colonic as soon as possible.
After having things moving you need to consider to just eat fruits. I hope you could get papaya or/and pinneaple.
Later you could consider a herbal bowel cleanse, for me blessed herbs worked very well.