I hope that your gecko gets sorted out soon Lizard
I echo what everyone else has said - ditch the sad! good old paper towels suffice perfectly - they carry no risk of impaction, look clean and are simply to keep the evironment clean as you can spot clean them knowing that all trace of bacteria etc from urates has been taken out - unlike with sand where you can only scoop the poop and the urates stay put :yuk:
Is you leo pooping normally?? If not then it could well be impaction - nothing will sort the problem out faster than a vets trip but for the time being you could try some simple things to help her.
Firstly (after you ditch the sad) ofer her some of the slurry that Lacey has given you the ingredients for above - a little at a time so she doesn't end up over full too quick and end up regurging it all! Also, if she isn't pooping you could maybe try massaging her tummy and giving her warm soaks in a little bath - just to try and stimulate her bowels.
Please do try to tell yor parents that she is important to you and needs to see a vet - I know it is hard dealing with it when some people see Leopard Geckos as ten a penny but she is your pet and you love her
Best of luck with her and please keep us all informed
