I am married for past two years but the thought of having kids freaks me out. Is this normal?

It's okay to freak out at the thought of having kids, it's definitely better than freaking out after having kids. Although that's a perfectly fine response too. I think what's important is to understand where those fears are coming from? Are they from feeling 'not ready' for the big commitment or is it a societal/familial pressure? Either way, assess your own feelings about it and make decisions then. Whatever you decide, there's no right or wrong about it, it's just your choice and your opinion. Don't worry too much about it, and definitely don't get pressured into having one just because you think it's normal. If that does happen, you're not being fair to yourself and the child.