ME, MYSELF, & I

My interactions with people are very trying. I enter conversations and situations fine, but I often leave them feeling immense inaqdequacy. My mind becomes suffocated with the residuals of the awkward silences, the things I forgot to say, the boring tangents I go on, the times my words stepped over someone else's, and it refuses to let go the next day long after the people are gone and I'm back home. 

Is this normal? Is something wrong with me?