heart problems

I dont know who else to ask besides everyone here. I've talked to my pediatrician when I had a physical in January and he said my heart was fine but all he did was check it with a stethoscope. I know it's common for people with anxiety to think they have heart problems but do these symptoms seem any differnt than anyones here? here are my symptoms

pounding heart-usually after i even walk up the stairs and sometimes if Im sitting down for a while and I get up even slowly my heart will start pounding
heart fluttering-I dont know what to call it but it usually happens when I am sitting down all the sudden it will start to beat really fast and I have to take a deep breathe for it to go away
dizzy spells and usually when they happen i feel faint.
swollen hands/feet
and if i cross my legs even for a short time my leg will almost fall asleep..it feels like i am not getting enough blood to them

i guess the symptoms dont sound that bad when I write them down but theyre so scary and im wondering if i have a heart problem ahh. i went to the e/n/t doctor and he said i might be getting dizzy because my ears were really err..clogged up. and i just had that physical and january but thats about it. do these problems sound normal? i plan on going to the doc soon but i still want to know if its normal. thanks

lauren