More information is needed before anyone can comment. Was it raining? Do you have windows open in the rain? Is the bedroom next to the bathroom (possible water line leaking). Pets in the room, relieving themselves? Is the ceiling wet or are the walls wet? Main floor, second floor, basement? So many possibilities!
If you want to Restoration, Renovation and Remodeling something, then use some companies. For example, there is one such as ReBath. I can't tell you much about it, but you can read https://rebath.pissedconsumer.com/review.html . Where there is a detailed description of everything about it and what customers think about it.
I didn't know what to do with the roof, which I only needed to quickly and intelligently disguise, so I decided to consider the question that this company https://www.roofingassociation.co.uk/how-much-does-a-new-roof-cost/ provided. They were very close and were within my price range. The roof is an excellent protection system against various things that can happen to your home, as well as the protection of your family, so it's better not to delay this matter.