I think I need some help.
What do you need help with?
I feel scared and anxious whenever I leave my house.
Well, the first step to getting help is to ask for it, which you just did.  That's a very important step!  Now you need to find a professional to help you through these issues.
I don't think it's necessary to see a professional.
I disagree because a professional therapist or counsellor is qualified to handle these types of issues that you're having. You'll get much better help from them than from anyone else.