Hey Amanda!
You're doing fantastic, 18lbs in 2 weeks is brilliant! You'd find it almost impossible to lose that much in a month on weight watchers or slimming world!
It is hard to start with, I felt just the same. When I got weighed on 4 January, I actually cried. My pharmacist told me I was 9 stone overweight. I actually thought what's the point, I'll never, ever lose that amount, but something inside of me wouldn't let me walk away from this. Just 12 weeks later, I've lost over 4 stone, and I actually find it really easy to do now. I don't have to stress about what I can/can't eat, don't need to weigh all my food, or count up points! Sure it's not always easy when the family are all sat down eating a nice roast dinner, or when friends are having a chinese/indian, but I just focus on how far I've come and the freedom I'll have when I reach the end of my journey, it really helps!
Stick with it hun, people will start noticing very soon!