You should have nothing to worry about if your blood work is clean. If it comes back negative, that will be the end of it. If, however, you have any controlled substances in your blood, even prescription, you may be prosecuted. If you want to be proactive, you could go to your own doctor and get a prescription to get a blood test for a toxicology screening. The closer in time that draw is done to the one the police took, the better you will be able to defend yourself should the police results...
Based upon the facts you stated, a judge should not find that you refused. However, a lawyer will need to see what the officer said in the paperwork related to the case before they could render a fully informed opinion.
It is not possible to answer your question without knowing more facts. Generally speaking, scars on a woman's face are worth more than a man's. Moreover, you suggest that thereby not be any scars. Furthermore, you do not indicate if there are any other injuries.
You should call a lawyer who handles personal injury cases. If you do not know one, I can provide you with the name of a lawyer in your area who handles them. Feel free to email me or call if you like.
The answer to your question depends on what county you're in. Moreover, the fact that you were in an accident could cause some complications. You should speak with a lawyer who practices in your county and then make a decision.
You caught a break if the officer cited you with a 1543(a) instead of a "(b)". Talk to a lawyer to be sure, but if what you say pans out, plead guilty and pay the fine before someone realizes the mistake and tries to amend.
You ever see the movie Dumb and Dumber? Remember when Jim Carey asks the girl what are the odds of the two of them going out and she says one in a million? He's ecstatic because he has a chance.
Whatever your chances are, you will definitely sit out a year if you don't appeal. So take a chance. You may actually have a legal defense. Plus appealing will, if nothing else, give you more time to get things in order before you start serving the suspension.
As far as asking a witness not to...
You will most likely get a one year suspension for the refusal. That will be a civil action. When you get the notice from PennDOT, you have to file an appeal. You are also facing another year suspension and jail if you are convicted.
However, there are many ways to fight both the civil and criminal cases. You should call an experienced DUI attorney now.