Hello, I'm A 48 Yr Old Male Who Has Been

hello, I'm a 48 yr old male who has been diagnosed with SVT. i've had 2 ablations, with the most recent one in 2013. I also had a loop recorder put in in the spring of 2013. the last 4-5 days, I've noticed that i've become short of breath and a dull sensation in my upper left chest. I don't have the sensation of arythmia but am starting to get a little concerned. thanks,