What do I do after wife filed injunction on me after I called cops because she tried to hit me with her car?

With regard to the injunction, if the court grants a temporary injunction, there will be a return hearing set in which you can present your side of the case to a judge who will then decide if the injunction should be granted or dismissed. In the interim, do not have any contact with your wife, no email, no text, no phone call, no third party contact, nothing. As for the incident with the vehicle, call the police and ask to speak with the supervisor of the cop that told you they could not make a case without any witnesses.  You area witness and your sworn affidavit IS evidence. If your wife has filed a domestic violence injunction falsely, that can be used against her later in the divorce when the court is determining the best interests of the children. You should get a lawyer if you don't already have one, it sounds like you are going to need it.