It sounds like you're definitely doing some intense workouts, so the weight gain makes sense. It's not fat you're gaining though. As the two previous posters mentioned, your sore muscles are most likely what's making you retain water. Or, while you may be burning fat you may also be gaining muscle.
The Texas Roadhouse meal most likely contained a lot of sodium as well, which can also be what's attributing to the water weight. If you start to get really discouraged by the scale, you should try measuring yourself for a couple weeks instead, then try weighing yourself and see if there's a difference. While there's not a loss on the scale right now I bet your measurements might be shrinking.
Also, at the same time you may be plateauing. I've gained a few pounds during a plateau, then eventually I'll start losing again.
And: never ever ever weigh yourself at the end of the day! You're always going to weigh much more in the evening vs the morning. Good thing though is that by the next morning you're going to weigh way less, so don't fret!
It's not physically possible to gain fat weight if you're burning more calories than you're eating (unless you have an underlying health issue like thyroid problems, or if you just started taking a new medication that makes you gain as a side effect), so keep that in mind.
So as you can see, there may be many reasons why you've temporarily gained, but it's nothing to fret about. Keep calm, you got this!