We noticed that when we pull out the knob to turn the water on to the tub that it felt weird and not as much pressure as usual. Then we switch it to the shower and not the shower head but the part where you turn the water on has a leak so instead of all of the water going to the shower head some still comes out of the faucet. My son was in the garage under our bathroom while someone was in the shower and there is a big leak and that caused some of the drywall to come down in the garage. There is no leak unless the shower/bathtub is on. Could it be the faucet that has been feeling funny and started to not send all the water to the shower head when switched and leakes from the faucet while the shower is on? Any ideas? My husband is pretty good at figuring out things and fixing things himself and has done any home repairs we have had in the past. Is this something that someone who generally can figure out home repairs can do on his own? Are we in immediate danger of the tub falling through the floor? The installation in the ceiling under the tub is there and you can't see the tub but some of the ceiling came down. Please give advice asap. Thanks!