Since august i've been having stomach pain on the left side doctors say its nothing but im in pain still what should i do and what do you think it is ?

Impossible to say...: Given the very limited information you've provided, it's impossible to speculate as to cause. You have not told us the acuity, severity, extent, circumstances, accompaniments, or exact location of your pain, nor what tests have been accomplished and what was ruled out. Please return to your physician(s) and proceed with further evaluation so a fix for your symptom(s) can be identified.