there are many reasons for cp and tightness it can be from lifting something heavy asthma attacks and so on , but i agree with jerry need more info ..danny grady, ncemt-paramedic
Your description is far too general for any real inputs.
Check you resting heart rate, and blood pressure and try to note any irregularity in your HR if it exists. Try to give us more facts.
In any event, symptoms that have not been checked by a doctor are worth making an appointment for a check-up.