Yes, I have had the same problem sleeping after stopping Kratom. I wanted to stop just to see what the withdrawals were like. Although mild compared to other fun stuff I found not being able to sleep was one and it was annoying. What I did was to start taking some before bed and then tapered it off gradually. After a couple of weeks I was back to normal and Kratom free. I did notice I had more aches and pains once I was off it. After about a month off it I decided to start taking it again. I like it, it’s not too much but just a little something to look forward to.