Totally agree that it's not healthy to lose weight fast... you probably didn't gain it fast - unless you have a medical condition or take a medication that causes weight gain, in which case you need to control the medical condition first or change medications - so it's not reasonable to think you should lose it fast.
If you want suggestions on how to lose weight safely, we'll be glad to help you.
Sorry no, as I think that's very unhealthy (and almost a surefire way to end up as a yo yo dieter who keeps gaining back more than was lost).