X2, worth considering. I wasn't going to until I saw the water in adjacent rooms. Granted I had a huge volume of water leaking and it got into the HVAC ducts and collapsed them, which was $3-4k alone to get replaced. All in all the claim was close to $13k but probably 2/3rd of my flooring was replaced (their idea, not mine).
All I can say is pull up anything you might think is wet. You could also call a restoration company and have them do tear out and dry out, it will probably be at least a grand though. Maybe less if you tell them it's NOT an insurance claim. I've found that the subfloors are usually weather rated and are a lot more resistant to water than I would have guessed, so just getting them exposed and running some fans can dry them out pretty quick. You will probably want to pull out the baseboard in that area. If the drywall is soggy get it tore out now, it's too cheap and easy to replace to risk leaving it there. You probably will only have to go up a couple feet.
Tell Sam to get his bathroom project done so he can come help you