High anxiety before labor?

I've got a question for those who have gone through labor. Before you went into labor, did you experience high anxiety? I have no history of high anxiety at all and seriously out of nowhere I got a panic attack tonight. All I was doing was sitting down to pump (per doctors recommendation to start contractions) and I got extremely anxious. I have been having Braxton hicks a lot more than normal for the past 24 hours but no increase in intensity or frequency. Any advice or experience with this?