Gotta love pregnancy! No in all seriousness I would def mention it to your doctor when you see him/her but it sounds normal!
Congratz on the pregnancy and have a great 9 months. God Bless
I'm 22 weeks Sunday and I still get like that sometimes, if im at work and getting out of breath and someone needs something from me no one has a problems waiting while i feel im ready. With laundry My boyfriend carries it to the places it needs to be. It is a lot better now and in my first trimester i was so tried that that took effect on it to! That was really my only symptom..
I was like that too - bringing up laundry from the basement to the bedrooms was extremely tiring. I am not overweight and somewhat active too so this has not been pleasant to me. I think it gets better but don't fight it - listen to your body :)