Heart Rate and Early Pregnancy

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Soooo normally my resting heart rate is in the mid 70s. Now it’s been soaring over 100 while I’m just sitting or sleeping in the middle of the night. My resting heart rate is now 82. And I usually sit at 95 or above all day.

Could I be pregnant? I have 8 days before my period should be here.

I have a cheap test on hand... should I go ahead and take it or wait?