@SpinningTops
How tall are you? At 122lbs, or 8 st 7lbs you probably don't have very much to lose, so you weight loss will be much slower than someone who has a lot to lose.
Is yesterday's meal typical? Because it looks OK - possibly a little light on protein, especially if the tuna was 'very mayonnaisey'. Lots of veg, which is great - but it could end up being a little carby if it's out of proportion.
Why not try adding an extra egg, and some cheese, and dropping one of the veggies at lunchtime? And make your breakfast pure protein, e.g. a cheese omelette, or scrambled eggs - don't forget that the yoghurt will have carbs in it too.
The other thing to consider is the size of your portions - we don't count calories on Bootcamp, but it is important to be aware of how much (overall) we're eating. Could you have had less of the salad? Are you having a lot of yoghurt and cream<, for example?
But to be honest, these are just tweaks - and without seeing what you've eaten on other days, it's difficult to really help!
Ultimately, given your current weight (and not forgetting that you have already dropped a couple of pounds!) I think you're just going to have to be patient and accept that loss will be slower from now on.