Sounds to me like you need to go to classes - if you put loads back on after hitting target when you stopped going to class - that to me shows where the problem lies - not going to class!
Not sure why people get so embarrassed about going back. If its anything like my class, people come and go so often, by the time you come back there's probably only a handful of people still around who were there when you went the first time - and there are so many ins and outs its hard to remember everyone anyway.
Your consultant may remember you but will be thrilled to have you back - its another paying member which is always good news for them!