While this is possible, testifying in front of a grand jury is extremely risky.  You should contact an attorney IMMEDIATELY before making the choice to testify in front of a Grand Jury.

Not without discussing your options with your ATTORNEY. As an accused, you cannot be forced to speak to anyone regarding your case. You have the right to assert your 5th Amendment Constitutional Right to remain silent and not to make incriminating statements at this stage. Your attorney IS NOT allowed in a Grand Jury Proceeding. [...]

Grand Jurys have three options: a true bill, a no bill, or to take no action. A true bill means the Grand Jury found probable cause to believe a crime happened. A formal charge, or an Indictment, is given to the Court. The case will then proceed to Court. A no bill means the Grand Jury [...]

Grand Jurys: Every felony case has to go before the Grand Jury before it is allowed to move forward to a trial in Court. Grand Jurys meet multiple times during their term and hear multiple cases during one meeting. Grand Jurys are only tasked with determining if the arresting/investigating agency had probable cause to arrest. [...]

A Grand Jury is a group of 12 individuals chosen to  hear all felony cases and determine if the case contains the necessary elements to move forward. Grand Jurys are secret proceedings. A prosecutor is allowed to present their version of the facts of a case and ask for a Grand Jury to determine if [...]