We had something odd happen with our bathtub/shower combo yesterday. My mom and sister took showers in the morning, and then, maybe 10minutes later when I went to get in, there was practically no pressure coming out from the tub faucet or shower sprayer. Nothing else in the house is effected with this problem and I am not exactly sure what to do. I tried unscrewing the tub faucet and cleaning it out. When I put it back on, some black specs came out, but I am still experiencing the water pressure problem where the water comes out at a dribble for both shower and tub.
Any ideas?
Thanks so much!!

Check water meter, is it moving with no one using water?