Villa: "you might consider a 20A breaker on the line too. Sounds like you potentially have a lot going on!"
You may want to reconsider this statement, The breaker never tripped, and there is a lot going on. I think if the wire were big enough , it would have a bigger breaker. Even if the wire is heavy enough at the plug and the box , you would have to check every connection to make sure there is no 14 anywhere.