100lbs lost 60 more to go!

Hey fitness pals! Im a 30 yr old single mom of two whose been overweight my whole life just about. On my 28th birthday I had a wake up call. I saw pix of myself from my bday and i didnt believe it was me. I couldnt believe i was "that" big! I mean i knew i was a "thick" girl but these pictures clearly showed i was FAT. I made it up in my mind that I would lose 100lbs by the time I turn 30. So I started this crazy starvation diet for a hot 2 weeks and failed miserably. I joined weight watchers and went to 2 meetings and never went back. I tried atkins for a hot 3 days and gave up. until i just said you know what **** it. Im just supposed to be fat. Another birthday came and went and here i am 29 yrs old and still FAT. idk what but something changed for me. I was literally tired of being a fat girl. I was just down right sick of it and ready to do what i needed to do to lose the weight. and so i did it! I lost 100lbs and i felt fantastic. So the summer came and i couldnt wait to party and show off the new 100lbs slimmer me. I stopped exercising as much and i started eating junky foods again and before you know it 10lbs packed back on like that! It pissed me off! so I said ok this is something that im going to have to work at for the rest of my life. I was more determined than ever. and then.....i injured my back lifting weights. Herniated disk. ouch. I was down and out for about 3 months and pack on another 9 lbs! Devastated to say the least. So now im in physical therapy and my back pain is manageable and i now know how to modify all my workouts to accommodate my back injury. So now my goal is to lose this 19lbs i gained plus an additional 40! It sucks to lose 100lbs and still be overweight according to my BMI. I just want a normal BMI and i want to be healthy and fit and feel good about myself inside and out. Any encouragement you can provide is greatly appreciated. I need all the help i can get. lets fight this battle with fat together and win damnit!