Not from the pregnancy, but many women have bad gas because of the effects of hormones, and this may make your tummy feel firm.
Nausea during pregnancy is caused by changes in the hormone levels in the body during the early stages of pregnancy. It usually happens early on in the pregnancy.
In the early stages of pregnancy she will have nausea, cramps, backache.
In early stages of pregnancy your hormones are going crazy, it is possible to feel softer down there with the change in your body, or it is all in your head.
No. Although many people do feel very tired during early pregnancy (or at other stages during pregnancy) others do not feel this. This is fine, as symptoms vary from person to person and is not a sign that anything is wrong
No, exercising is good for you and very important when pregnant and as long as you feel good things are fine.
By the time you'd "feel" anything there you would be VERY pregnant. Take a test.
I think that you should take a pregnancy test when you think you are pregnant, or when you feel something in your tummy.
During early stages of pregnancy its more of a wet sensation and I will say its way better than regular sex because you and the man will get more of a feeling and at the time you won't be thinking you hurting the baby only because the baby didn't fully develop yet!
In my experience, my belly button did not feel different during early pregnancy.
It is normal to feel bloated in early pregnancy.
Accompanying other symptoms yes it can be your insides making room for the baby. You will feel this more at the early stages.