I've been caught out by a recent Thai b & s switch myself, so I know how easily it can happen.
Like you, I'd had a good recent run, and you're buoyed by optimism, and your concentration dips, and Bang!, you're the fly in the web before you know it.
Oh well, taking a chance is a big part of the fun of it all, and the odd dud is inevitable, so better luck next time!