Heart palpitations?

Am

Is anyone else having heart palpitations? I’m 36 weeks 4 days and I get this feeling out of no where that I can’t catch my breath and my heart starts racing, when I check it it’s around 134 pulses/min but my blood pressure stays around 114/56-120/70. It freaks me out cause it feels like a panic attack, but I’m not panicking or stressed..?!