and again --- for us NON-doctors ----- sometimes REST, or light play days usually resolve this swelled lip (funny feeling issue) -- for me it is about 4 days later, that all is well again!!!
Why do you want to wait that long. If you do massage right after you "overuse" you lip muscle... You will have it back the next day (so long as you have not done damage to the muscle... which is unlikely).
When I get swelled and tired I put my hands on the widest MP I can find!
That would work as long as you can maintain control of hitting notes. But when you loose this control, it is time to put the horn down and walk away, because if you continue at that point, that is when the risk of damage to lip muscle really increases quickly.