Yesterday, I flushed my toilet and it went down but there was no water pressure. The bowl and tank fills with little water. When I flush it now it either doesn't flush or half way flush. Then I used my shower and as I was taking a shower, the water started rising and then drains reallllly slow. I haven't plunged either one because I'm afraid I will make it worse. But my all my sinks in the house seem to be running and draining fine. So now I don't know what the problem is. What gives? I checked the main line and when I run the sink with water... it appears to flow out fine. I hope there is no obstruction anywhere.