Excellent!! That's the spirit! Just keep with it, it will get easier. And remember that it will likely happen to some extent from time to time no matter how long you are at it. It's the nature of the human mind. I have bipolar and when I am manic, with the racing thoughts it's almost near impossible to do, but near impossible isn't the same a completely impossible.

I hope you keep going and don't be too hard on yourself. You will still reap the benefits that meditation has to offer you.