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. Its difficult to tell what are this heart pinches.It is possible that they are related whith a rhythm issue. An extra sistolic beat or an arhythmia might couse prematur or irregualr heart contraction that gives palpitation, heart pinches or a kind of chest discomfort whith anxiety, difficulties in breathing deeply. The couses of this rhythm issues might be different to simple emotional stress or different pathologys like anemia , hyperthyroidism , electrolyte imbalances, cardiovascular disease. Also pinches that come and go whith seconds might have other couses like neurotic, musculoskeletal issues ect. 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 , a holter rhythm monitoring to see your rhythm tendency and a strees test if it is possible. After all this we can be shure if its is something that we should treat or not. Hope I was helpfull. Best regards,Dr.Ervina.