wvhoodoo,
I get from your name that you are from West Virginia and that you are practiticing hoodoo, that is, African American folk magic. That's great -- and i am going to go real easy and gentle on you, because you may be a young child or teen, or you may have read on the internet that "hoodoo is for everyone" and "it's easy." You may even have heard that it is a kind of West Virginia or Appalachian form of magic, for all i know. Stuff like that has been all over the internet this year.
However, all that aside, hoodoo is the folk magic of African American culture. In other words, if you were not raised in African American culture or around it, and if you think that hoodoo spells can just be performed by following written instructions, like cooking... well, you will be as good (or as bad) at it as the average household cook, but you will probably never be a master or mistress of the art, a chef. Worse, lets compare hoodoo to African American music styles. Without being in and around African American musical culture, you may be a good copyist, but you will probably stay at the level of playing extremely tight instrumenta copies to which you cannot sing the vocals and uploading them on you tube, playing air guitar in your bedroom, or singing karaoke at some cheesy bar on karaoke night.
So let's look at your questions:
1) "Today I see that my urine in a jar with red pepper will cause urinary tract issues with me?"
Really? Do you have an enemy who put your urine in a bottle with red pepper and cursed your urinary tract? Did you do it to yourself, like, i dunno, somehow blanking out and cursing yourself in your sleep or while on drugs? I mean, sure, putting your urine in a jar with red pepper would be a way to curse you, well known, quite old and authentic, but that was NOT the spell you did. Or at least it's not the spell you described doing.
Don't be messing around with spells you are not even doing. You are wasting your time (and mine, too, i might add) -- because there are about 100 more urine spells and red pepper spells you weren't doing either.
You weren't wearing red pepper in your shoes for protection. You weren't sprinkling your urine in your lover's foot track for love. You weren't cooking a few drops of your urine in corn bread and feeding it to your dog to make him stay close to home. You weren't dressing an enemy's candle with DUME Oil and rolling it in red pepper powder and burning it upside down on a toilet tank and extinguishing it by peeing on the stub and flushing it to get him or her out of your life.
In fact, i would say you had only looked at one red pepper and urine spell and then, later, when you saw that there are many, many more of them, you freaked, because this tradition is not familiar to you. Well, freak no more.
2) "Is it the intent?"
Is WHAT the intent? I don't get the question.
Are you asking, "Is it the intent of a spell that causes it to work?"
The answer to that is, "Well, intent is a PART of it -- but there are also spirits, and plant and mineral allies, and scriptural or extemporaneous prayers, and magical links to the targets, and enactment." Magic is a deep and complex subject. Study it; you just mght learn something.
3) "Should I pour the urine out into a fire, smash the bottle, and bless with Van Van and hyssop?"
Probably -- given that you have no idea what you were doing, why you did it, how you expect it to work, or what outcome you desire -- you should. I don't know about you, but based on what you wrote here, i have no belief that this spell was well thought out, performed with confidence and in a traditional manner, or held in mind as a righteous and justified act of vengeance. In any case, your bizarre moment of self-dount concerning getting a urinary tract infection tells me that you lost that round. Instead of remaining in a strong, determined, aggressive, tenacious frame of mind, you collapsed into blubbering fear. So that one bit the dust. In other words, the trick got turned back on you. Try again.
4) "How do I get rid of the remains if I do destroy it?"
See my "Hoodoo in Theory and Practice" page on Laying tricks and Disposing of Ritual Remains here:
http://luckymojo.com/layingtricks.html