I had this severely up to about 12 weeks. SO much so that I'd need to sit down and take deep breaths. Was quite scary - but mentioned it to midwife and she wasn't bothered at all - said it's quite normal. Am 14 weeks and the worse of it has passed although it's still there. Yesterday my heart was beating so fast I could hear pulsing in my ears!
I think it's normal. I am 17 weeks and have felt breathless and like my heart was v fast since day one. Apparently your heart rate goes up from an average 70 beats per minute, to an average of 90. Mine is 100 at the minute. And I am always out of breath at the top of the stairs! Have read lots of things that says it's normal.
I've had this since around 6-7 weeks, and I'm now 13 weeks. I asked my Dr about it and he said that all my organs are working in overdrive just now and it's natural. It's a horrible feeling as I was fit as a fiddle beforehand!
Then get those teens to start pulling their weight mrsjammi. I try to get my Ds(10.10)to do things for or with me and they are hard to motivate into doing something for mum or dad(in my case 'me'), but I do believe it's essential for them to help out, even if it's small things. Ds does the recycling most of the time and puts the rubbish into the wheelie bin ~ which isn't a lot, but it takes that small thing off me...can't say he likes it though!