Pregnancy and depression and other issues

Hi,

I just found out I am pregnant with our second baby. The first one is 18 months old. Pregnancy is in very early stages - doctor predicts 6-7 weeks although we think more 4 weeks. My GP has mentioned that there is protein in my urine; is there anything I can take for that? My first pregnancy was uneventful although I elected for a c-section. Recovery was slow; excess bleeding and lots of aches and pains although these have been resolved over 6 months ago with a fantastic osteopath, homeopathy and some herbs.

Is there anything I can take to 'strengthen' my kidneys during the pregnancy so there will not be any problems. I have also been feeling rather depressed with this pregnancy; can't seem to pull myself out of a rut kind of feeling. I had to let go of a fantastic job offer when I realized I was pregnant and I think that is the main cause of my depression. I am happy with this pregnancy but it still depresses me and I am afraid it would affect the baby.
I am starting to feel very tired, grumpy and sick. Just mainly feeling lots of flatulence and the feeling of wanting to burp/throw up. Nothing comes up, but am feeling sick in the stomach and rather blue.

Also one other concern; I put on a lot of weight with first pregnancy; 15 kilos. I retained half of it. I am worried about putting on too much weight and want to ask if there is something I can do to try to maintain/control even though I feel it's silly during pregnancy but it's one of the depressing things I am feeling now.

Thanks for help.