Sudden pain when urinating, visible "stuff"
I am a 27 yo male. Woke up in the morning, watched some tv, went to the bathroom - everything was completely fine. Started exercising a little later and began feeling this urge to urinate. It got worse and worse and started to burn, so I went to the bathroom and had SEVERE pain in the penis while urinating. The urine flow was obstructed. My penis hurt so bad even after urinating. It finally got better after maybe 5 minutes. Looking in the toilet, you can easily see alot of little balls - either white or ivory colored maybe? A couple had a "rust" like color and were more like little rectangles. Went to the doctor and had to give a urine sample - pain started again but not as bad. The little rocky stuff was on the bottom of the sample. They are sending it for testing, but I won't know for 2-3 days. I'm on an antibiotic now, since the dr felt it might be a bladder infection, even though they are rare in males. It still hurts to urinate though, and I really don't want to put up with this for 2-3 days until the results come back.
Anyone have any ideas? Should I wait it out? Or should I see a second doctor?