Can u give us more info, what light u using how far is the light from the plant, how often you are watering it.
- from seed it can take up to a week to water it again depends on your indoor temps. If yo ucan pop another seed do it, it wil ltake just a few days to be like that one. To early to tel lto be honest. if ur cup is heavy means is to wet... when sprout they dont need that much water just and u can always skip a watering day just spray it with water (PH at 6.8 6.9 if you know how to) also like indica33 said, research research, youtube is your best friend, just smoke some good shieet and you click play to a how to grow medical marijuana video and you will be rolling =)
- Jugz