I have had some squeaking going on in the floor between the sink and the toilet for a while now. I do not know if it is getting worse or if it is just driving me crazy every time I have to walk on it. This is my master bathroom and is on the other side of the wall of my hallway bathroom. The end of last year our hallway br. toilet overflowed and some water went down to my tenants apt. through a dry vent hole opening but I did not see any water seep through to our master. I would guess that it probably wouldn't have since we got to it quickly (overflow). Back in March I had the hallway br. shower drain replaced because water was leaking down to our tenants apt. through a vent onto her sink. I also had a faucet diverter replaced in the master br shower/tub due to it not working. It had worked when I first bought this house in July 2010 and I had rarely used it. When rest of the family moved in here and I went to use it to give the youngest a bath and the water was dripping down the wall of the shower and not out of the spout. We did not use it while it was broken. We waited to have it fixed until March. We also had the hall br shower faucet/diverter replaced at the same time due to age. we stopped using the master shower for a while until diverter was replaced. The squeaky floor section is not next to this tub. I guess my question is could any of these issues have caused water to seep under these tiles somehow and go unnoticed. There is not any leaking dripping down to my tenants first floor br. Would I need to have the tiles ripped out? Can they replace them with the same ones? Could this squeaking be from another issue other than water? I love this bathroom with it's beautiful deep dark blue 2 inch tile floor. It does need some updating sink base wise but I can't afford a remodel until next year. Thanks for any helpful info.

Sue