Liability once LLC

I recently began experimenting with a business idea.. Not sure how it would do. I found that my products are ones that people like and are purchasing. At this time, I have decided to convert my business to an LLC. The question I was hoping to have answered is related to liability of my product. I have pursued completed product/operator insurance which was effective going forward. Will converting my company to an LLC protect my company from anything that could occur from products sold before the LLC was created?

Thanks in advance!!!