Maybe I think too much

Oddly enough I think that I am less happy when I spend time with people than when I don't.
I feel sort of awful when I try to converse casually. Or-I should say-I feel very awful after I have carried on conversations. At the moment I'm fine. Then, thinking back, (obsessing back as it were) I become more and more uncomfortable. As I converse about odd things and tend to speak in the same manner as I do whilst on the Intertubes.
It's a distinct and vague sensation that everything I say is so particularly outlandish or ridiculous as to render me more than a little mad.
Is that something everyone does? Is it normal to feel like it's better not to speak at all rather than risk fearing that those to whom I have spoken view me as-not stupid as I don't think I appear stupid, but eccentric. Very, very, eccentric. Possibly high functioning autistic or similar. Possibly worthy of pity.
This is why I don't talk to people. I am convinced that any time I have contact with people they are left wondering how it is I manage to cope in society.
Something I wonder all the time.
Otherwise-despite being in pain-I enjoyed myself this evening.