My question involves criminal law for the state of: North Carolina
About 9 months ago, I communicated threats about a woman to a mutual acquaintance. At the time I had undiagnosed bipolar disorder which caused me to have extreme anger/temper issues, and I didn't mean what I said when I said it. The threats were made in an online chat with the acquaintance which I have no record of now, but I said that her and my boyfriend better not become close friends or I'd punch her in the face. I repeatedly said this over many occasions to the acquaintance.
The woman in question was in a working professional relationship with my boyfriend and I was jealous that they were to spend a year together in close contact in their job overseas. At the time I made the threats they were already overseas (this was back between October 2009-January 2010) but they are due to come home next month in August.
Because of drama surrounding this and other issues, I cut ties with the people involved and have not spoken to them in a threatening manner since January and have gone to no contact other than to make efforts to apologize and to make sure it would be OK, if I am able, to pick up my boyfriend when they return since everyone is coming back as a group together. I haven't been contacted by police or anything so I'm guessing that the police were not notified, but I'm afraid when the unit comes home that somehow the woman who the threats were about could possibly go to the police. My boyfriend and I have worked through our issues and I have gotten help for my bipolar problem, and I am no longer unstable. We have also agreed it would be best to avoid hanging out with anyone in his unit or the wives/girlfriends until most people have moved so I know I will not be around the acquaintance or the woman that I made threats about.
I have never been in trouble with the law other than speeding tickets and I have a career where a single misdemeanor would end it. Since I talk to no one now who was involved in this situation, I have no idea if or when this could turn into a criminal matter, and I just need to know what kind of possible outcomes there could be in this situation? Is there a statute of limitations for pressing charges? Since what I did was months ago, and since then I have not done anything would that impact whether charges could be filed or if the case would be accepted?
Thank you.

