Yep it has affected my life but most importantly my self esteem . In fact I was having conversations with my colleague just now and out of nowhere I experienced one block , all I wanted to say the word "nearest station" , but couldn't able to say that, then I tried substituting with "closest " and yet again I blocked. I had to switch to my native language for the remaining conversation.My colleague thought I didn't knew the word or maybe lost my train of thought in between. There are days when I am very fluent and then there are these days when I stutter even on the words I didn't even knew I can .