HELP!!! YELLOW LEAVES AND SPOTS!!!!

HI MY 7WEEK OLD PLANT HAS RECENTLY DEVELOPED YELLOWSPOTS ON ITS LEAVES AT FIRST I THOUGHT IT MAY BE THE LIGHT BEING TOO CLOSE AND SO MOVED THEM BACK A COUPLE OF INCHES BUT SPOTS ALSO DEVELOPED ON THE LOWER LEAVES TOO (SEE PICS) SO I STARTED TO THINK IT WASNT THE LIGHTS AFTER ALL, SOME OF THE BOTTOM LEAVES HAVE BEAGAN TUENING YELLOW AND DYING, IVE READ THIS MAY BE A NITROGEN DEFICIENCY? IF SO HOW CAN I CURE IT QUICKLY AND CHEAPLY?, MY SOIL PH IS 7 AND I USE BIO BIZZ NUTES ONCE A WEEK OR LESS, CAN SOME ONE PLEASE GIVE ME AN IDEA OF HOW MUCH WATER I SHOULD BE FEEDING MY PLANT? I KNOW WHEN I SHOULD WATER BUT HAVE NO IDEA HOW MUCH

CHECK OUT THE PICS AND PLEASE SOMEONE HELP ME!

Attachment 287095Attachment 287096Attachment 287097Attachment 287098Attachment 287099.

SIDE VIEW OF MY PLANT:

Attachment 287100

looks like nutrient issues to me.