See a personal injury lawyer right away. Asking for help here is no substitute for the advice and counsel of an attorney you see face to face and who can ask you the many questions that need to be asked.
Great question! The mere presence of alcohol in your blood is not admissible unless it can be shown that it impacted your ability to drive. The DUI limit is unimportant in a civil case. The key cases are Fisher v. Dye and Morreale v. Prince in Pennsylvania. Speak with a personal injury attorney in Pennsylvania and not to the insurance carrier. Good luck!