Heart racing/. Anxiety pregnancy symptom?

I’m 8 dpo last night in the middle of the night I woke up so anxious like I could barely breath every time I fell asleep I would wake up like that. Eventually I was able to fall asleep and stay asleep. Tuesday and Wednesday had bad lower back ache which is better today. But I’m wondering if that anxiety/heart racing could be an early pregnancy symptom? Anybody have this?