PVC's and PAC's-will it get worse?

For years now I have had sinus tachycardia and PAC's and PVC's.  I had a 24 hour event monitor in fall, and in 2003 I had a 3 week holter monitor and an echocardiogram, as well as various EKG's.  Everything proved to be normal excpet for these things.  The doctors reassure me that it is nothing to worry about. Mind over matter thing, but it's easier said than done.  I am 27 years old, I used to suffer from panic attacks now I rarely have them but I do have anxiety and inability to succuessfully cope with some stressful situations.  My question is, will this eventually turn into a more serious thing? Or is this really that common?  Also are there any other tests I should have done?
The other thing is, yesterday I had an episode where I felt really light-headed, exessive yawning and I think I was having ectopics at that time.  I know it's happened b4 in the past but, what is this?  Any help please, its greatly appreciated!
Thanks

hi i am glad i found this site i have been suffering these awful paplpatations for 5 yrs now i awake everday thinking about them i went to see cardio doc last week he told me to come of beta blockers well had to call doc out on friday as my heart felt like it was gonna stop having them every sec they jump then stop jump stop so on it felt like it lasted for hrs but it was twenty mins to long so doc told me to go back on betas its all i think about from the min i get up its ruling my life i am such a panicky person my cardio says nothing wrong with heart loads ofpeople suffer this biut they dont understand there is bount to be something they can do plz help docs   feel free to email me i would love sumeone to talk to with same prob [email protected]

Well, I have been experiencing PVC's for the past three years.  The past month they have become more frequent.  I notice mine more after exercise.  I did have a few today which I took as an off day from exercise.  I read recently that foods with gluten can cause these?  I have never heard of that?  I don't believe everything I read on the internet.  I see my Cardiologist for the first time Monday.  I am hoping he will do a stress test.  I had a EKG which was normal a few years ago.  I also had a 24 holter too.  Nothing showed except PVC's at times and bradycardia (I think).  These are very scary, as I am worried my heart is going to stop:(