I have the same problem. I'm 19 weeks but have been feeling my heartbeat all throughout my body since I was 6 weeks. I feel my pulse the most in my tummy and my fingertips. It's become a pet peeve lol.
Im 11 weeks and I feel the same every time Im coughing and it is horrible :/
Yeah. I had that from about 7 weeks and still get it every now and again nearly 12 weeks now.
Its normal I wouldnt stess about it.