I had my gallbladder removed 11 months ago.

The diarrhea is getting worse. Its watery, slimey and just today it was black. I am getting to where I don't want to eat because I'm tired of running to the bathroom. I am afraid of going out to eat for fear that on the way home I won't be able to find a bathroom in time. Any suggestions on what I should do?

Then you should go to your GP.  Suggestion from non-quaified persons won't be helpful.  It sounds very much like blood to me.  Go now!

I always thought if there was blood it be tarry like.

Hi.  Whether it's  slimy or tarry, I would have though that with the colour; your continual diahorrea and  associated pain - my first thought would be blood.  Do get professional advice.  At least they can rule out as well as rule in.

Do go and.. good luck.  Jon