I see you have been keeping track of its weight, if it got down on only 70 grams in that time don't worry, the important thing is that its weight doesn't decrease heavily in a short period of time.
Sometimes snakes are picky feeders, check that it doesn't vomit, or that it doesn't have any other kind of problem or minor disturbance. Give it a hide to feel safe, usually when they don't move it's better for them to be hidden and it might aswell give you a better chance to get it to feed again.
Relax and don't panic, I know it can get frustrating, but it will eat eventually. Good luck ^^