Back in early feb, I had a heart monitor on over weekend due to heart palpitations. All came back normal , but was made aware that my heart rate at one point went up to 188 beats per minute ! That’s very high ?! Anyways fast forward I’m now 21 weeks pregnant and palpitations and pounding heart have gotten worse (on some days not everyday) out of breath easily etc. I’ve had bloods to check thyroid , iron and had ecg , all normal ? Ecg just shows high heart rate but normal electrical rhythm . Can anyone shed some light ? What this could be ? My sister has POTS and is convinced I have that cause my blood pressure is always low too. But no referral to cardiologist. Any advice would be appreciated, will this get worse as pregnancy progresses ?