I had a similar rant a week ago. Although things have taken a significant turn for the worse since then and I now long for the days when giant piles where my biggest problem. You've got every right to be fed up, it's a difficult time, I hope everything goes well for you, not much longer.
You are not being selfish! I probably had less symptoms than you, but I finished an MA assignment 8 days before my dd was born. If I'd been moving house at the same time I would have died, or killed someone! Don't be so hard in yourself!
It's not selfish, just don't share your feelings with any infertile friends or friends undergoing fertility treatment cause that would be really insensitive. But being totally fed up in the last couple of weeks of pregnancy is totally normal.
No not selfish at all, the last few weeks are a killer. I'm at the same point as you as you and I'm struggling badly! Have had an awful pregnancy, we really thought at one point the baby would be here between 26 - 30 weeks, luckily that problem has righted itself and knowing my luck I'll probably head in the other direction and go well overdue
Be kind kind to yourself, put your feet up and take it easy, easier said than done though!