I'm sorry you're feeling so down
It's good that you've got that mindset about food, and that it's a positive one.
Do you keep a food diary of any form? If not, it might be worth starting to. It may help for you to write everything down each day and then when you get to a stage where your losses have tapered off, you can look over your foods and find out whether you have changed any foods or not, or whether yo've increased on eating the less healthy things.
I'd defo agree with the water intake - it's surprising how much of a difference it can make to your losses. You don't have to drink plain water - put some cordial in it to give it some flavour. I love the Robinsons cordials so I've got 3 different flavours of those and I change them regularly to make it less 'boring'
With regards to the exercise, how recently have you started with the walking/jogging? Do you feel achy afterwards at all?
Have you noticed your clothes feeling any looser? Sometimes we don't see the results on the scales, but we can see them in inches instead. It may be worth taking your measurements, and then repeat the process in a few weeks time to see if you've had any changes there. Because you're exercising, you may not be losing the pounds, but you may find that your dress size is changing.