worries!!!!!!!!!!!!!

today i entered in my 15th week of pregnancy, so many doubts reg my intake,

1. my tap water is in powder white color, i don't know y it is coming like that, scared to use that water
2.yesterday i ate dal which i cooked in the morning, but ate at night 7.30pm, is that ok???????????
3.upto my 10th week i take 400mg of folic acid only, later weeks my doc changed it to elevit. is that ok!?