Anxiety Attack? What?

I have never experienced something like this before so I am coming to you ladies to see if I need to go BACK to the doctor.. or if this is just another piece of the PPA puzzle. I posted recently about tingling hands and feet, which seemed to get  A LOT better after normal blood test results and talking to my doctor about them being a symptom of sleep-deprivation and stress and having him explain to me why they are happening (I'd be happy to share if anyone is experiencing the same thing). 

But.. last night while I was laying in bed, my husband and I were joking around, BS-ing, talking, the baby was sleeping peacefully in his room, everything felt fine and BAM my heart starts racing like I was having a heart attack. It took me a few seconds (30?) for my heart to slow down, but I've been thinking about it ever since. I wasn't all sweaty or hyperventilating like some of the symptoms I've been seeing online. Just the racing heart and racing mind afterwards. What the heck was that? I've never had a panic attack before, but I always assumed they happened more like a climax of crying or being in a moment of extreme anxiety, not hitting me like a train just before falling asleep. I've been really stressed with tasks of switching to a new job, motherhood, buying our first hosue, and being matron of honor in an upcoming wedding (my friend is being a bridezilla and her mother in law may be certifiably insane as well...), plus my tingling brought on a whole bunch of fun health concerns and obsessions... 

So, what do you think.. Is this another manifestation of my stress or do I need to go to a cardiologist?  I run/exercise about 4 times a week and my blood pressure is normally pretty good. I've been struggling with stress and I've been considering trying to find a PPD/PPA counselor to help me sort through some of it. Hubby says "You don't need a counselor.. just talk to me." Sigh. 

 Thanks for reading.