Hi Caroline!
Congratulations on your pregnancy!
I have a 3 year old boy, then I had a miscarriage, it was very early in the pregnancy, after that I too was very scared, afraid that something could go wrong if I got pregnant.
I am happy to tell you that now I have a almost 1 year old baby girl. I was able to get pregnant right away just a month after my m/c.
I have heard of a lot of m/c with second pregnancy, I would never say that is normal but I can say that happens a lot.
By the way, you worry about your age, I am 38 I had Eva at 37, so we are about the same age and she is very very healthy and no problems. I did have a difficult pregnancy though.
Enjoy the little or no symptoms while they last, that won't be long! And the bloating, I would say is completely the pregnancy, meaning is more that just bloating, this time around your belly will pop out much faster than with your first pregnancy.
I wish you a nice, pleasant pregnancy and a Beautiful, healthy faboulous BABY (hopefuly a girl this time?)
M.