help >_< i think my plants dieing!

the other day i noticed a little yellowing on the lower leaves n now they have started going white at the tips of other leaves and all the leaves are starting to droop a little im using soil i bought from a gardening center and its indoor grow im starting 2 panic because im inexperenced in growing and i dont want my first plant to die its 5 weeks old and its getting abot 11 hours of light but sometimes i try to give it more becaus i dont want it to bud yet >_< but its starting 2 smell so good if it dies ill cry so much man lol

More light man for starters....18 to 24 hrs for veg!!!!

yeah man thats what im doing now im keeping it under a lamp nothing special but keeps it from budding but do u think thats the main problem?

drastic but i cut the tips of the leaves that were yellowing in fear it would just spred up the leaves :/ sum 1 know whats up? i hope it wont die its cheese bud T_T

sounds like the beginning of nute burn google canibus growing problems [white tips and read away hope this helps

Copy-n-paste the troubleshooting form here, and fill it out as best you can.

Cutting off portions of the leaves might make you feel better about the damage, but it's a band-aid on a gunshot wound. All you are doing is masking the problem, not solving the issue.

Pictures would help.