Martial Arts

I’m ashamed to admit after being active, I am now a lazy person. I’m a waitress, and also a black belt in taekwondo. However I haven’t been back in 2 years and you sure can tell! I’ve had a very stressful 2 years(marriage, moving 3 times in a 2 month period, and hosts of other “issues”), I have gained about 20 pounds(I had 10 pound of muscle when I was healthy but I think now that’s liquified to fat) Right now I have NO exercise routine. I have a lot of pressure in my spine, so sit ups are difficult for me, and my midsection is the part that is suffering. I’m starting to cut out caffiene and soft drinks. I’m considering going back to class once a week but it isn’t very motivational for me anymore, I would rather do kickboxing but its not offered around here. I’m 21, anemic, and depressed because of my situation. I feel pathetic, as I should, but I never lost weight(or inches) in taekwondo and I was in good shape! I just want to lose inches(not weight necessarily)! Any advice? Thanks!
I do like to walk or jog, I have no motivation by myself usually, but it is winter. I like to lift free weights.
I’m 5’4 and 145, I’m used to weighing around 125-130(depending on what exercise routine I was in), weightlifting I weighed around 125, TKD I weighed 130….and then…AWWW!!!