Pacemaker

I had a pacemaker put in on Feb 08 and ever since that day i have gotten better but now i have a sympton on where i lay on my left or upside down i feel my heart pounding thru my skin and its visiable i especially feel it more when i take a deep breath in this positions...And when im doing excercise my heart rate goes up to 190 is this normal??

[Cleveland Clinic]

You should have your pacer interrogated to extract information about your heart during exercise.  It is possible that you could have an arrhythmia, especially that most pacers don't pace this fast.  The alternative is that your own conduction system is healthy and capable of conducting this fast during exertion.  As far as the symptoms go, I wonder if they are related to RV pacing which may occur rest if your lower rate limit and the atrioventircular delay are set a certain way.  I would recommend seeing the cardiologist who put in the device to address these issues.