Second pregnancy , I'm end of second trimester and I'm so tired all the time. I've been so tired all the way through, I get out of breath just going up one flight of stairs as though I've been running. I was quite fit before this pregnancy running a few times a week and now I can barely walk the dog round the block. I feel like this can't be normal ! Does anyone else have this? I don't remember feel quite like this with my first and I'm beginning to worry something is wrong with me !