Hello and thank you for using HCM.I carefully read your question and I understand your concern .
I will try to explain you something and give you my opinion.
You should know that premature heart contraction might have different causes to simple emotional
stress or pathologys like
anemia,
hyperthyroidism , electrolyte imbalances,
cardiovascular disease, active infections ect.
You don't mention the real neck problem.It might be a thiroid gland problem, any active infection.All these might be responsible and the reason of premature heart contaction.
Resolving this might resolve also the extra beats.
Having small regurgitation is quite normal.
If I was the treating doctor I would recommend some examination like a full blood analyze to exclude anemia , hyperthyroidism , electrolyte imbalances and a holter rhythm monitoring to see your rhythm tendency.
Hope I was helpfull .
Best regards , Dr.Ervina..