Yes, I would speak with a criminal defense attorney in your area as soon as you can.  Welfare fraud is a very serious matter and maybe if the "fraud" was not intentional (you need intent to defraud) but rather a mistake or inadvertent then you can cut a deal as to repayment (making restitution) and possibly pleading down to a lesser offense or no offense if you are lucky enough.  Having some "muscle" behind you makes it a greater likelihood that you will be able to come out on top and obtain a lighter sentence.  Also, if you are charged and sentenced ask your attorney about expungement of your record and make sure that whatever you plead to may be expunged in Pennsylvania.  Good luck.