My tub has been very slow draining lately so I ran a snake through as far as I could via a cap on the top of a T joint just above the drain's trap. I pulled out quite a bit of junk so I figured the problem was fixed. I covered the joint back up and tried to run water through it and it's actually worse now. Water is actually not running through at all. Also, the bathroom sink drains into the tub now. Any suggestions would be great, thanks!