You are soooo brave to admit this to everyone!!!
PLEASE GET HELP NOW!
Go to rehab. If you don't, you wont need to worry about your band or your weight or your children....you will be dead. I am sorry to be so blunt but I see this everyday because of what I do for a living. I am so scared for you because I know what drugs do to the body. You needn't be concerned about the band. The drugs you choose probably wont affect the band but they WILL AFFECT YOUR HEART AND YOUR BRAIN. The cocaine and ecstacy will put you at 100 percent higher chance to have a heart attack. It skyrockets your blood pressure and as a result you could end up rupturing a blood vessel in your brain and have a hemorrhagic stroke. You are already at risk for blood pressure problems because like everyone here, you carry extra weight. The drugs will intesify that risk. GREATLY!
Again, I am sorry to be blunt, but sometimes it needs to be said. You NEED TO BE SCARED! I wish I could take you to work with me. I deal with death every day and those people that die prematurely....in their 20's, 30's, 40's and 50's.....the majority of them have drugs on board. Ususally cocaine or some form of it.
The exercise is great for you...but if you are doing aerobic exercise while on cocaine, your heart eventually may not be able to handle the overload. It is already working too hard while on drugs....do not go and exercise too!
You already found the courage to admit your problem here. That is the biggest step. FIND THE COURAGE TO GET HELP NOW! Now is the time before you move on to a daily habit or choose more or other drugs to obtain "the feeling". I know you can do it! You care about your kids, your health, your God, your life. You took the scary plunge and tackled your weight with getting the band. YOU CAN DO THIS. It wont be easy, it wont be fun, but you will be alive and healthy! We are here to support you!