Hi Julies, not quite 41, but a few months over 40 and having my first baby (due date is this Thursday, yikes!).
My pregnancy has been quite straightforward, no sickness, and generally have been feeling OK, except from developing facial paralysis (Bell's Palsy) at week 29, which is now very slowly recovering.
I am Spanish, but living in Singapore, where they're still very conservative, and a bit judgmental, about someone being pregnant in their 40s, so I have had to put up with a few comments from my obstetrician along the lines of:" considering your advanced age", and "you're high risk", blah, blah.... When in reality, I've been feeling totally fit to be pregnant and have suffered no complications with a very healthy baby (so far and fingers crossed), all along....
I guess since this is your 5th, you know very well what to expect and have a lot of references as to how your own body works during pregnancy. When are you due?