TTC for the first time at 31

My husband and myself just started trying for our first baby. We are excited and nervous. I have really bad anxiety and have been concerned about it affecting me. I am so ready to be a mom but I get scared too. I'm also nervous because my in laws do not want us having kids. They aren't supportive at all and make comments about my husband. These comments are unnecessary and rude. It makes me uncomfortable because I don't want them treating our baby poorly because they didn't want us to have children. Any advice or words of encouragement?