Hello and thank you for using HCM.I carefully read your question and I understand your concern.You shoud not worry about this . It's nothing serious.
Your symptoms are related whith a heart rhythm issue.There are some electrical impulses that generates in a part of the heart different from normal
sinus rhythm.This couses a heart contaction that's not a normal one.You feel it it like a premature contraction , a skipped beat and it might give you
anxiety,
palpitation or difficulty in breathing deeply.
There are different causes of this rhythm issue like simple
stress , coffee and alcohol consumption.
Also pathologys like anamia,
hyperthyroidism or
ischemic heart disease might be other causes.
So,if I was your treating doctor I would say that you have nothing to worry if it happens once a wile.Only if these interfere in your daily life I would recomend you some examination like an electrocardiogram , a cardiac echo , a full blood analyze to exclude
anemia, your thyroid hormones and the most important one a holter rhythm monitoring for 24 h to judge the frequency of extra beats.
Only after this we can better know if it is necessary to treat them or no.It might be just a stressed period, it will pass.
Hope I was helpfull.
Best regards.