Hello, so far I don't have any irritations but now that you mention the buttache... and I thought it's the new chair I'm sitting on.
But for me, I had very severe back pain about 7 weeks into my pregnancy. My gyne said that I've a retroverted uterus, so it was pressing onto my nerves. It was so bad that I had difficulty standing up. Thankfully it's much better now.
BTW anyone here seeing Dr Vincent Lee, who's at Mt E and also has a clinic at Bishan? I'm seeing him now. The thread on him has been inactive since last Dec.