Once all the oil leaks out, it'll stop and no more worries. :-)))
Or, pull the axle, replace the seal and you should be good to go.
Check the axle seal area for pits, burrs, etc. This won't make the seal work properly if this is damaged. When you replace the seal, clean the area really good, inside and out. Replacing seals is rather simple with the correct tools. Seal puller and a driver is all that is needed.