anyone experience an increased heart rate as an early pregnancy symptom?

[ALT76]

So I'm at 12dpo, and for about the past week I have noticed that I have an elevated heart rate. I have been extremely fatigued at times, and during those times of laying around and watching a movie for 2 hrs, my resting pulse was anywhere from 90 - 120!!  Today it has been around 88 - 100 all day.  Normally, my heart rate is quite regular, and my resting pulse is in the mid 60's to low 70's as it should be.  I know that when you get pregnant your blood flow immediately starts to increase, so I could see how this could be a possible indicator.  I was just wondering if anyone out there has ever noticed anything like this.

[Jtally214]

All day my heart feels like it's beating through my chest...ugh, scary feeling. I'm glad to see that's it's not just me! Even when I try to rest it doesn't stop! When I go to bed and wake up, it's the worst! Good Luck!

[babyscience]

I had that with my first pregnancy.  I know a few other women that had that as their first symptom.