Would I need braces or a retainer?

I have a slight overbite that covers about 1/4 of my lower teeth. Also, I have 1 tooth in the front of my top teeth that is crooked and shorter than the rest. My dentist told me I don't need braces, but I find my teeth really sore in the morning since I've been told that I grind my teeth at night. I will probably visit an orthodontist soon, but would I need braces or a retainer to fix this? Thanks!