Zurf, if what you're doing is working to keep you in the loss average of 2 lbs per week, then you're doing great! I'm no specialist, but the suggestion is usually cardio every other day/ and toning on the opposite days as that... and take at least one day of rest. Walking is cardio... sit ups are toning. I get frustrated when people get so hung up thinking that they need to go to a gym and use weights that they forget to just use their own body's resistance sometimes. Again, it sounds like you're doing great! Zguitar is totally on the right track! Although, I'm not so sure strumming counts as exercise! LOL!
Selso... chances are you are not eating healthy??? I'd say step one is to write down everything you eat for the next week. Literally, 5 M&Ms write it down. 2 dozen wings with 1/2 cup blue cheese dressing, write it down. Then get to one of the websites that has the food pyramid on it and take a close look at it and see what you could improve upon with your eating habits. Then, same as someone trying to lose weight... look at your physical activity. You can't be hungry if you're not getting rid of the energy. Exercise releases GOOD vibe feelings in the body that help you want to do better with your eating/and help with your emotional well being. And well... there's a whole lot of emotional baggage that pushes us to not do so well sometimes. Ridding yourself of some of that will make a world of difference too. I think I sound rather presumptuous here, and I offer my apologies for that... just while there's usually underlying reasons and the nitty gritty of them is different for everyone, they are usually the same reasons at the heart.
I've personally been on a heal my own emotional baggage kick lately... I do tend to implore others to do the same when I get this way, cuz it feels good to see the light and not just wander through the darkness wondering where the end of the tunnel is! I think I sound a little crazy tho. LOL! So I'll stop there. Good luck my friend!