Do any of yall just totally blank when trying to have a conversation?

So I'm VERY introverted but I'm constantly thinking about literally anything and everything always in my head, but when I occasionally do socialize I'll just totally blank on what to say or a good question to ask to keep the conversation going.

Maybe it's partly due to pressure but I don't really get shy like ever, if I have something in mind to say I would feel comfortable just walking up to some random guy on the street. Anyways I'm wondering if this is a common INTP thing or if I'm idk just socially awkward or something lmao