Edward was concerned about having sex with Bella. ヴァンパイア can't get pregant,so he figured she couldn't get pregant. Also he was too emotional to hear the baby's thoughts.
Hi,what I meant was that he was pissed off and upset that he couldn't hear the babys thoughts. He thinks that the baby is going to kill Bella so he wants to get rid of the baby until he hears her thoughts that is in the movie
1. As あなた know Edward can not read Bella's mind so that will prevent him from seeing anything that's going on in there about what ever's going on with Bella.
2. Edward does not know that Bella might skip her period. Of course he would not unless she told him about it which then he would know about.
Just go and watch the film and see how he find's out if she does fall pregnant.