You need to go meet a criminal lawyer ASAP. Do not give any information on an open forum such as this. Anything you say can and will be used against you... As my old criminal procedure professor once said... "There aren't very many mutes in prison." Don't give any potential evidence on a forum such as this. Go meet with a criminal attorney fast.
Your conduct (e.g., furtive movements, running, etc.) plus spacial proximity to the drugs is sufficient for a jury to convict. The officer will testify to something more than just you were present. However, according to the particular facts of your case, you may have a good defense. You need to hire a lawyer to review the officers case file.