Hi DivotMaker, Welcome to the heart forum we are happy to have you join us here. I am not a doctor either but the one thing that did jump out at me in your post was that you are taking Albuterol and this is a Bronchodilator. Meaning it is used in the prevention of asthma, acute bronchospasm, bronchitis, emphysema and reversible airway obstruction. It does induce cardiac stimulation with usage. There for adverse effects with use can be palpitation, tachycardia, hypertension, angina, hypotension, and dysrhyhmias.
Since you have a history of MVP and are now having these palpitations regardless of the cause my suggestion to you would be to seek out a cardiologist for treatment. Never let any kind of chest pain or discomfort go untreated. It is entirely possible that medications aggravate benign heart problems but they do need to be checked out by a specialist.