I am the same way orange, but I gotten so use to being stuck, but I still can't get over looking at my own blood. I just close my eyes.

It also really annoys me when nurses compliment you on your veins *shivers*

But I agree with birdgirl to go check for a urinary tract infection. Prevention is best you don't want to get to the point of major blockage because I'd tell from first hand experience, ever heard of a nephrostomy? Essentially, it's having a bag of piss on your leg as a replacement for your kidney. A tube is run from the tube in your kidney and it drains into this bag which you manually empty like you are taking a piss.

Hope that motivates you to go to the doctor