Something strange has happened to me.?

Alright, so I have been feeling really awkward in conversations with people recently. I don't know why, but for some reason when I'm talking to someone (even friends that I've know for years sometimes), i feel tense and really uncomfortable, like my face will blush sometimes. I'm not nervous in social situations or anything, like I'll go to parties and can chill there easily, but just when talking to someone, this happens. Really weird, anyone know anything abut this?