Should I let my parents know? Slight trouble breathing ?

I was just laying in bed and have just started to feel slightly breathless and it's quite an uncomfortable feeling, I can still breath ok it just doesn't feel as normal like my breathing seems a lot slower than normally. I'm not sure whether to go and wake my parents to let them no or not, as atm it doesn't seem to serious. Any suggestions what it could be? Also lately I've been feeling really drained and tired a lot not sure if this could have anything to do with it.