You need the assistance of a qualified criminal defense attorney. If you can't afford private counsel which seems implicit in your statement here, then you need to apply for the services of the public defender at once. With no prior record, your chances of avoiding jail are quite high, but that possibility will be increasingly possible if you are not properly represented. You've done enough on your own.
You need to stop discussing the facts of the case in a public forum and contact an attorney immediately. Your sentence will be based on the PA sentencing guidelines.
You need an attorney. If you can't afford an attorney you should apply to the public defender. In most counties you will be eligible for ARD which is a pretrial probation which offers you an opportunity to earn a dismissal of the charges upon sucessful completion an to have your record expunged.