i had such a nice lookin plant before and now everything got all fucked up 
all my leaves including the cutting leaves are brown (burnt at the tips) and each day r getting more and more yellow and eventually dying off. the burnt tips i suppose are cuz of a nute burn i guess but i just cant understand y the leaves start getting yellow and then die off. the cutting leaves are also burnt at the top but not as much but as the days go on they get worsly burnt and appear yellow as well. What should i do? can any1 help ... is it a major risk that i may loose the whole plant? also if i flush a 3 gallon pot how much water should i put. Im rele afraid to flush cuz i always heard over watering will kill it so i dnt get how ppl flush their plants. when i water my plants i always wait till it starts wilting then i give them a good amount. what should i do about this whole situation cuz i rele dont know wats best. i dnt have a pH tester and i rele dnt feel like goin out to buy 1 so some basic tips would help.... i rele wanne get buds outta these girls.
if i leave it as it is can it get over the pblm on its own?
and the yellowing of the leaves i guess are a nutrient defficiency so how can i give more nutes if the tips are burnt due to over fertilization ( or is it part of the same problem?)
help would be appreciated thanks

all my leaves including the cutting leaves are brown (burnt at the tips) and each day r getting more and more yellow and eventually dying off. the burnt tips i suppose are cuz of a nute burn i guess but i just cant understand y the leaves start getting yellow and then die off. the cutting leaves are also burnt at the top but not as much but as the days go on they get worsly burnt and appear yellow as well. What should i do? can any1 help ... is it a major risk that i may loose the whole plant? also if i flush a 3 gallon pot how much water should i put. Im rele afraid to flush cuz i always heard over watering will kill it so i dnt get how ppl flush their plants. when i water my plants i always wait till it starts wilting then i give them a good amount. what should i do about this whole situation cuz i rele dont know wats best. i dnt have a pH tester and i rele dnt feel like goin out to buy 1 so some basic tips would help.... i rele wanne get buds outta these girls.
if i leave it as it is can it get over the pblm on its own?
and the yellowing of the leaves i guess are a nutrient defficiency so how can i give more nutes if the tips are burnt due to over fertilization ( or is it part of the same problem?)
help would be appreciated thanks