Hello and thank you for using HCM.I carefully read your question and I understand your concern.You shoud not worry .I'll try to explain you something and give you my opinion.
Normal
heart rate range between 50-100 beat for minute.When it exceed 100 beat for minute in normal
sinus rhythm we call it
sinus tachycardia.
There are different causes of sinus tachycardia.Simple emotional stress, during physical activity or after coffee or energy drink consumption the heart rate goes up.
Also there are different pathologys like
anemia,
hyperthyroidism, active infections, heart anomalyes that might be resposible for fast heart beat.
When you have excessive heart rate it is normal to feel
palpitation all over,in yoour head, neck.You might feel difficulty in breathing deeply,
anxiety.
So, if I was your treating doctor I will recommend some examination like an electrocardiogram , a cardiac echo to evaluate heart function and walls, a full blood analyze to exclude anemia , hyperthyroidism or active infection.You mention that your ers is high, it might be an infection somewhere that keeps the frequency high.
Also, I will recommend a holter rhythm monitoring to see your rhythm tendency.
Only after this we can judge what we should do and if it is necessary to treat it medicaly.
Hope I was helpull.
Best regards.