You need an attorney ASAP. If you cannot afford private counsel get a PD assigned. You can defend the case or work a deal and PTI is also available if you have no priors. The PIC is to try negotiate an early end to the case. You can plead to a deal, try to get a downgrade to municipal court or apply to PTI. All these options need to be explained to you. Call for a free consultation if you like.
Mr. Cheser is correct. You need a lawyer. A pre-indictment conference means your charges are indictable (felony) and carry serious consequences. The sooner you get an attorney who can get statements from witnesses, document prior instances, investigate the "victim" and communicate on your behalf, the better chances you have of avoiding serious consequences and criminal convictions.
You need to hire an attorney ASAP. At the PIC conference it is likely that the Prosecutor will offer a pleae deal. Feel free to contact my office for a consultation.