Dealing with your family can be difficult if they are against your decision to have a baby alone. If you're comfortable with your decision, deal with their discomfort by asking them to talk about the reasons they are against your pregnancy. You will never change some people's minds, so you will have to learn to live with their disapproval or ignore it.
Don't encourage others to ask you questions about your pregnancy unless you are comfortable with their questions. Some people are genuinely concerned about you; others are just nosy. Before you answer, decide if they are truly interested in you. Then share with them as much or as little as you are comfortable discussing.