Same. I'm a healthy weight, in reasonable shape and my asthma is dorment. I used to smoke cigarettes but gave up for baby when I found out I was preg. I can barely breath just sitting sometimes. X
I'm experiencing the same symptoms at 6 weeks-out of breath when walking up the stairs, crampy/tightness/pullng. Oh, and my legs are exhausted! It's all normal and I had the same symptoms with my first son. I think it has something to do with the increased in blood volume that starts early in pregnancy. Also, your body is working hard growing your baby! My favorite pregnancy book is The Ultimate Pregnancy Guide for Expectant Mothers by Alex and Elizabeth Lluch. They've already covered the symptoms you've mentioned and explained whats going on. Check it out if you're interested.
Am asthmatic overweight and a mature mum too and at 28 weeks but have a lot of energy such that I didn't know I was pregnant till 2nd trimester coz I never had any changes. That's why why I was saying different pple react differently to pregnancy and its the first time not knowing I was viz with my other kids there were signs on my body. And yes winter makes us a bit too comfy and our bodies weaken.
Its probably a combination of the asthma and being a bit out of shape. I have been getting winded lately too going up and down stairs. I havent walked/exercised at all over the winter, so i feel out of shape.
Sometimes it could just be your hormones as your body confines to realigning itself to the changes taking place. People, ' bodies react differently to pregnancy. There is no one size fits all. But am not a doctor so the best way to be sure that all is ok is to see your doc about it.