The dark urine could be related to problems with your gallbladder or liver, so it's important to get that checked out as soon as possible. When the breakdown products of the liver can't be excreted to some extent via the bile, these products back up and are forced into the bloodstream causing a darkening of the urine due to bilirubin being present. But there are also other causes of darker-than-normal urine. Call your doc and set up an appointment to get some testing done.
Hon, you are going to have to take some time out of your work schedule and visit your regular doc if you have one or an internal medicine doc, let him do a workup on you so he can narrow down what specialist you might need to be referred to. I don't know if the urine and constipation are interconnected or not, but if they are, it's important to see a doc. Now, could be you have two separate problems, in which case it may be fairly easy to treat you. For your constipation, I got a couple tips to help you in the meantime. Put plain KY jelly on the area where the waste comes out, and it'll pass without so much pain. Also, other kinds of fiber to eat include oat cereal and whole wheat sandwiches, so fit those into your diet. And you also have got to find time to exercise rhythmically and then really relax afterwards, it helps digestion. I wish I knew more about the kidney situation, but I don't, could be several things.