Heart palpitations??

Molly • 38 year old mom to my baby boy Oliver and pregnant with baby #2. Due 1/17/19

I’m 5-6dpo today and since I woke up.. I have had heart palpitations all day and an increased heart rate. The last time I felt this was when I was pregnant with my son. I had it throughout my whole first trimester. I don’t recall getting it this early. Anyone else experience this prior to their BFP??y pulse has been higher than normal too. I don’t have anemia, I drink OJ for potassium everyday, and I’m hydrated. And not stressed