I am 18 years old, female. I exercise. I weigh 117 pounds and am 5'4 tall.
I always had palpitations after I drank coffee or tea. But recently these palpitations doesn't leave me a second.
Then I started having dizziness/vertigo, which seems to have left me now.
I also have some chest/back pain, which could be caused by my stomach (reflux?)
These palpitations are not really fast, I don't think my heart rate ever goes above 100 (exercising doesn't count). But the thing is, beats are so strong that I can feel it everywhere. In fact, when I sit still, **my body slightly rocks** (I checked on my webcam if I was really rocking and - yes). I can see my pulse on my neck and I bet my heart is visible on my chest when I'm lying down too.
So I went to a cardiologist, had ECG, 24h Holter, Blood tests and colored doppler electrocardiography. The doctor only checked the results of them which were watched/seen by other people. (who probably does this as a job, they would be experienced right?)
Other than that, the doctor in my school, which is actually neurologist, told me I had heart murmurs. I had ECG again and he said ECG was normal.
I am confused. Why didn't the cardiologist told anything about it? The school doctor checked twice and it was there both times. What causes these murmurs?
Is it possible to miss some problem about valves on echo? Is it possible for me to have some serious thing like regurgitation? He said it was probably not really important but I am concerned.
I also have these skipped/extra beats more than before. It's like my heart is having a heart time.
Should I be concerned?
What causes such strong beats? or murmurs? Should I continue exercising?
Could my chest/back pain related to my heart or is it just my stomach?
Thank you in advance for answering my questions.