Cardio: HELP PLEASE? My heart feels like it's beating right in my throat?

you maybe overstressed or you are worrying about things too much.you need total rest, calm your body and mind, follow some healthy diet routine (without skipping meals) and see for a few days if you get better.if it still goes on you can see a doctor to confirm any problems and to get treatment. but usually if its related to your circulatory system you would show other signs such as shortness of breath, headache or chest pain, tiredness.when you are stressed you tend to develop false alarms like that,try not to worry much.