Foot in Mouth Disease

Lately it seems that I always say the wrong thing. Take yesterday for example, I started off the morning by saying awkward things to my roommates. Then I asked a friend a personal question in front of a lot of people. Then I went to lunch, where I couldn't even seem to form a complete sentence. Then, I betrayed a confidence, forgot to bring things I had promised people, and once again, couldn't form a complete sentence.

At church, I feel obligated to talk to people; it's my job to help people feel welcome and loved. I'm afraid that I just go around offending them. So...I guess I am saying that I think maybe I should not be allowed to talk to people any more. Maybe that way they won't get offended and leave the church.

That sounds pitiful, and it's not entirely true that I don't think I should talk to people at all, it's just that I need to learn to think before I speak. Thinking in general sometimes seems a bit beyond my grasp. Any suggestions on how to go about this?