hi when i urinate i have a feeling of presure not a pain and after i finish going i notice that there are a few drips of pink bloody urine at the very end. so i have been going in a clear sample cup so i can look for stone or something. what i have been seeing is white floating things like a stringy substance in it and today i saw a large chunk of it looks almost like a wet watered down scab prob. about 1/8th in diameter or a little smaller. i had gastric bypass about 6 months ago and have been taking iron forcon, calcium, vita. d, a multi. vita., fish oil and somthing to help prevent stones. i have had about 130 lbs. drop in the past 6 months. should i be worried about this