When I went for my booking appt at the hospital 2 weeks ago, they did the normal blood tests, urine test, height weight etc..

Anyway I havent weighed myself since being pregnant but a month or so before (so around sept/oct time) I weighted JUST under 9 stone..
When I was checked at the hosp the midwife said I'm 54kg= 8st 5!!

How have I managed to lose weight?? Should I be worried??

A lot of people are said to lose weight initially in the first trimester - especially if you have been sick or off your food. Also, if you are eating the same calories (or less) than you normally do you will probably lose a bit of weight, because some of those calories are going to little bub!

I am sure everything is just fine. You could always have a quick word with GP if you are worried.

I agree with Poppy. Your GP probably would have said something more if it worried them? I know my doctor said that they look at the overall pattern of weight gain, and that it's not uncommon to lose some weight in the first trimester (as long as you aren't losing too much).

I lost weight, I'm only just starting to even out and put some back on...

Its perfectly normal but if it worries you go get it checked