When it first happened it seemed like that there was no trigger at all,only that I was lying on the sofa at late night and all tired.But after that first time there may be major nervousness that takes part in contributing to the symptoms.Yes I had been diagnosed with OCD when I was around 16 and received some treatment but it never really goes away.Also I had lymphoma too and quite got my brain damaged and droning but I doubt it having anything to do with my speech.After your advise I think I may go find some anxiety-reducing courses on net.Thank you for your share,sorry for your experience and happy that you’ve been speaking normally now again.Sincerely appreciate your answer.Have a good day!