Hi Love
I really hope you can do it hunny, really I do, I too have been trying for children and its just not happening and have been told that at my weight I will not even be considered for treatment!! Oh lovely.
Ok seven weeks, thats a stone and a half which is achieveable on CD so based on that what would it bring your weight down too and then have a oook on a BMI calcualtor and see what it says.
i really hope you get under it sweetie.