Yes unfortunately it is :( I loose my breathe sometimes without even doing anything and my heart will start beating really fast but they say its something of how your baby moves or presses again something to cause it
I'm only 19 weeks but my breathing has gotten awful..I get winded walking up the stairs to my apartment! You can get pregnancy induced asthma that will make your breathing difficult.
it might be your baby putting pressure on your lungs try sitting or laying in a different position