I agree that this could be a little stress and you could try the breathing with a paper bag trick like you do when hyper ventilating. Just slow calm breathing. Do not panic yourself, if in doubt, always consult a doctor, they are very patient and will check that you do not have any chest infection or any other prob.
I took the treatment for 10 months & when the breathing became labored it was because of my platelets going so low. I had to take shots sometimes to bring my blood levels back up, could that be it do you think?
my pulse also started to get high about 95-100 for no apparent reason. I am 26 and i stopped taking zoloft on my own. dr say it could be anxiety. I also had a hard time breathing dont really know what the hell. I dont have insurance so for now i left it alone in hopes that it goes away on its own. I also noticed that excersising helps mine normalize.