I had been eating "paleo"ish (with dairy) for at least a year before I got pregnant (also my 3rd). While I was unable to stick to with it strictly, especially during the first trimester, I ate a healthier and more paleo diet than I had with my previous two pregnancies. (I tried hard, but somehow, sourdough bread with butter and ice cream just were too good to refuse.)
I gained very little other than baby weight for the first couple of trimesters, but in the third trimester (summer), I started to retain water -- a lot. I ended up gaining 40lbs, and peed out a lot of it within the first week postpartum. Baby's now 4 months and I'm only 6lbs over my pre-pregnancy weight, but still have a bit of a pot in front -- perhaps stretched out abdominals (as well as some added fat)?
I started drinking iced lattés made with 10% cream instead of milk. Those were good, and I loved that I was shocking people with my disregard for the high fat. lol -- at home I made them with 35% cream! I also didn't restrict my diet -- I ate soft cheeses like brie, drank raw milk, ate sushi, had the occasional beer or wine, etc...
I had a great pregnancy. Only mild nausea when hungry at the beginning (just like previous pregnancies), hormonal mood swings were definitely happening, but manageable (an improvement over previous pregnancies), but the edema at the end was worse. I think the extreme heat we had was a contributing factor.
As for the glucose tolerance test, I didn't do it. I was followed by a midwife from a centre where it is the norm that patients make informed decisions about which tests to do or not do. I also chose not to have certain u/s tests. The midwife agreed with me that there was no indication that the glucose tolerance test would be of any benefit for me.
There was so much that I did differently this time round that it's hard to say what was from diet, and what was from opting out of the mainstream Ob/Gyn care. However, I think it's also possible that I made different choices as a result of the better diet -- I was much more confident and thinking a lot clearer, and not depressed at all.
I had the baby at home in my living room, in a birthing pool. I laboured in the backyard with my husband and mom in attendance, I ate a slow-cooked lamb shank drowned in sour cream while in labour a couple of hours before I hit transition, and the midwife arrived in the middle of a thunderstorm just as I was getting ready to start pushing. Pretty primal, if you ask me! :)
Oh, and now I have a placenta in my freezer!
Edited to add: Oh, I took folic acid, omega 3, and roughly 5,000iu of Vitamin D. The midwife was recommending lower doses of everything except the folic acid.