I don't know what type of stuttering this is.

I don't know what type of stuttering this is. On some days I feel like I can say anything without stuttering. I can hold conversations, I can talk to others properly. But on other days I won't be able to talk properly and it's just frustrating when your friends know you can talk but one day to them you just randomly decide to be antisocial. I've heard of people stutters going away for a year or a couple of months but mine seems to fluctuate per couple of days.