Vitamins and nuts

Thanks to perfect blood tests, I was not required to take vitamins while pregnant. Except for the folic acid. So I eat as many fruits and vegetables as possible, once a week I eat fish and every other day I have yogurt with oat flakes and dried fruits. Also, I like eggs, so I have eggs a few times per week. And nuts every day. Must be why sometimes I feel nutty :)
I have a friend who only ate sweets all 9 months. She gained only 7 kilos (my doctor told me it is reasonable for me to gain 12 kilos) but even if the mommy was a little under-weight, her daughter was almost 3 kilos, healthy and beautiful. So my plan is to eat whatever I like, not to allow old ladies in my family try to force meat or anything on me. I will eat what I want, as long as I feel good and my baby develops normally.
About my going to gym, I also had very interesting advice from "experienced" moms. Apparently, going to gym is bad for me. For me? But my doctor and my trainer said I can go on as I plan, with moderate exercise, not overdoing it, but keeping it nice and relaxing. I was exercising prior to pregnancy, why should I stop now?
So, I will only follow the signs my body gives me: if I feel tired, I slow down or stop. I won't try to break any pre-pregnancy records. I will not overwork my joints, I have heard that I will become more flexible, but I don't plan on acquiring a handsome injury while pregnant.
I am monitoring my blood pressure and my blood sugar two times per week and everything is perfect!
Apparently moms who work out during pregnancy have shorter labors. Plus that it keeps me in a good shape both physically and psychologically! So, as long as sports keep me happy and healthy, I can only see a win-win for both my baby and myself.
So I need to filter the advice I get since apparently the only good advice will come from my doctor.