Heart pounding and feels like it's racing?

Carrie • 💕46 1/2 yr old Mom of 6 Sunshines🌞, 1 Angel👼🏼 & 1 Rainbow 🌈
I'm 10 weeks 3 days and over the past week and a half I've had many moments where I feel like my heart is racing & pounding just randomly. Occasionally at the same time or separate times i get shakey too. I have had no caffeine & this is my 7th pregnancy but I've never had an experience like this so I don't know if it's pregnancy related or not. I've ensured plenty of fluids and proper nutrition. Has anyone had this experience? I don't get my 1st OB appt till 12 weeks but do have an Endocrinology appointment tomorrow to follow up on thyroid. Not concerned overly, but curious.