Thanks so much everyone for taking the time to reply. It is a relief to know I'm not the only one who has had this happen before. I am pretty much a normal BMI now and I do enjoy doing quite a high level of exercise (although haven't last few days).
I think that considering the amount of exercise I currently do and would like to do, I have decided to move up to 1200 rather than stay on the 810. It's a little premature, but this has given me a fright and it's just made me think that I am ready to face life with food finally.
My hols are in 3 weeks anyway, so I want to get used to making good choices and hopefully the exercise and added calories will boost my metabolism. I never wanted to SS or SS+ and then go straight into eating heavily in Orlando.
I can't it over with my CDC, but I'm sure that she'd agree with me and she knows my goal from day 1 was fitness and improved health. I guess I'm just looking for a bit of reassurance now (as I can't talk to CDC) that I will be okay going to 1200 and doing exercise and am not going to mess up all the good work I've put in. I'm prepared to gain a little as I eat carbs, and I am thinking sensibly, but part of my head still thinks 'you'll put it all back on.' Is this normal thinking?