Extremely happy to have you here! Sounds like you have the right mind frame and the motivation!
I think having a support group to go to and be accountable to is very important..however (and this is just my humble opinion) I think you could do it without the medications. You did it before...I think if you stick with if for the long haul that you can do it with calorie counting and exercise (basically what you did with WW). That is what a majority of the people on this website do and these people are a great support group. These people are always here for me when I'm not in class which is all week except for one hour!..
I'm all about all-natural, and doing things the way God intended.
He didn't intend for us to inject ourselves with things to help us lose weight....(although like I said, just my opinion) Whatever choice you make we're all here to support you and will help you with whatever you may need help or advice with. YOU CAN DO IT!!!