I wasn't vegan through my pregnancy, I started off ovo-vegetarian and fell into a lacto-ovo state which i now regret. Basically, you can start off with the best intentions to eat well and the first trimester can knock you for six... I had horrendous nausea and eating was a battle, so I found myself eating junk food... and then stuck in a food court with rising nausea I ended up having to eat something with dairy as there was nothing else I could eat that didn't have meat. I really believe this contributed to my bub's early reflux, she was sensitive to the dairy.
It is much healthier for your baby if you do not consume dairy while pregnant. It is easy enough to not eat meat while pregnant (you may find your haemoglobin decreases, thus making you borderline anaemic, but this is usual even for meateaters and most pregnant women supplement their iron intake anyway). Eggs and honey are unnecessary too, so no problems there! Make sure you're getting enough ALAs (omega-3s) for brain development. There is contention over whether flaxseed can actually increase DHA levels or not... I'm no expert, you'd have to make up your own mind on that one.
My B12 levels also dropped, that may also be a supplement that is needed. My midwife was supportive of my diet, though I think she would have preferred if I ate fish. But as long as you eat a healthy vegan diet I think it is better than the average pregnant omni's diet, which largely consists of fried takeout and icecream LOL.