Ok I am kind of worried, since the last time I weighed myself 4/5 days ago I've dropped from 126 lbs to 120 lbs making my bmi go from 19.7 to 18.8 :S
I am worried as I usually loose about a lb every 2 weeks, has this happened to anyone else & does anyone know why it has?

If your not doing anything different then Hurrah for you! It might just be your body catching up with itself, maybe? Anyway I am sure it is something to be very happy about and not so worried. Unless you've started eating less or something? Or maybe exercising more?

It's possible that your body is just catching up to past loss - mine does that a lot. I don't lose regularly 2lbs a week. I lose 4lbs here, 3lbs there, etc. It's just a quirk.

It's also possible that you could have lose some water weight. If you had a few very low sodium days, you might just have shed some water.

I'd say if it's a one-time thing, don't worry about it. If it continues, then go see a doctor.

Thank you for your replies, I think it was probably just fluctuations in water weight as this morning I weighed 122