When to change out prop?

I took my boat out last weekend but unfortunately there is a ton of debris. I was mostly cruising at idle in spots it was so bad. At one point I thought I badly damaged my prop because the boat was shaking while giving it gas. I stopped the boat, put it in reverse and then went forward again and the vibration has been gone since. I looked at my prop last night and there is one small area along the edge the felt a bit serrated from hitting something but it wasn't bent or cut at all. It made me start wondering at what is acceptable and what isn't. I don't think this justified replacement or fixing but at what point do you replace a prop? I can only assume that I had a piece of debris stuck somewhere causing all the vibration and that going in reverse freed it up. Anyone else experience that ever? The boat is a Sanger v215.