Not bad, after 2 hrs you were back to were you started from, at least it did not go up like yesterday. Half a medium sized tomato is only about 2.5g of carbs. Experiment with quantities, tomorrow eat the same breakfast but eat the whole tomato and see what happens. Also, check just before you eat lunch and see if it creeps up, stays the same or goes down.
One of the mistakes I did was to introduce too many variables at the same time so it was hard to follow what actually made the difference. Do one change at the time, one small step. Also remember that most of the time results are unpredictable, one day you eat something and get 7.0 for example, next day you eat the same thing and get 8 or 9. And just go for a walk after the meals. Keep fighting and good luck.