If they are just pointy then you dont have TO much to worry about, but it might not be a bad idea to do it if you can... If you cant, then make sure that you dont hammer it on the way home... save your chain, get a small can of chain lube and every time you stop spray a small amount on just to be safe
Also make sure it is tight (in spec) to help keep it cool.
Having snapped a chain , that I did not think was all that bad ,and creating some serious damage when it pulled into the front sprocket cover , snapping the clucth pin and covers , plus the mounting points on the engine casing.
Now I don't take chances with chains and sprockets , it's just not worth the money you end up spending, even though my dad sorted it out in his machine shop for far less than it would have cost.
If it worries you change them now.
If your rear sprocket doesnt look like a saw blade, and you take it easy, you should be fine... I have pushed chains way farther then most, I just know that you can not push them hard when at the end of there life.