I am having bad pains in my ab region today. It just started today. I am 18 years old, 5'11. 185. And male. I have had a complete loss of appetite today, and from the second I woke up have felt pains in my ab region. Sometimes in my right side and in the mid region too. I have gone to the doctor today and there nothing he could really do at the time as my blood and urine sample were fine. This pain is still consistent. What should I do?

If it has progressively gotten worse, you may want to see about getting checked for a kidney stone or possible appendicitis.
While blood or urine tests may pick up the infection, they may not always in the beginning.

Any severe pain, especially if you start to have fever or nausea along with it, would be a good reason to head to the ER.