What do you think??

14 pounds in 10 weeks might be a bit of an unreasonable expectation when you're just above a healthy weight for your height, it's a pretty aggressive rate of loss, you can probably expect to lose a couple of pounds of water weight initially and then average around 0.5-1lbs per week for a healthy rate of loss.

If I were in your position I'd be focusing more on body composition than actual weight, keeping your calories at a small deficit (0.5lbs per week), ensuring adequate protein and doing a progressive overload program for those 10 weeks will ensure you're fueling your exercise, reducing body fat slowly and maintaining muscle which will help you appear more defined.

Also referring to it as eating off-plan, rather than thinking of it as off plan, plan it into that week, weight management isn't a temporary thing and there are always going to be nights out, work functions, family gatherings, etc where you might eat differently than you do at home. If you look at your calories over the week rather than each day you can normally factor these things in without them having any adverse effect on weight loss, learning this early, makes maintenance a lot easier to manage.