First Time Grower

Well here I am just entering into late bloom with 3 weeks left before harvest and I have just encountered my first MAJOR PROBLEM. I don't know what is wrong. Last week, I noticed some nutrient burn forming on the tips of the leaves of both plants. I flushed with some ph'd calmag water. Everything seemed to be recovering well. I had a pretty rough night Saturday and felt like all hell on Sunday. I forced myself to mix the nutrients and water but apparently I made a mistake. When reading my feeding chart in my hangover state, I managed to confuse some of the nutes and wound up giving 2.5ml/gal of Flora Nector when I was supposed to leave it out this week. Ugh. Today (Tuesday) I opened my tent and noticed a bunch of leaves are starting to turn yellow, some have yellow spots and I found about 3 or 4 leaves that have a few rust colored spots (not many spots but still). I am in flower! I can't have issues like this now. Not to mention, the plant on the left is just not growing upward like the other. Yet, the buds it is producing are rather large and bigger then the plant on the right. I hope I didn't mess these girls up. After flushing last Thursday I really really don't want to do it again right now. They only have 2 more weeks until I use FloraKleen to flush the girls out before harvest. This week that is just starting is my "late bloom" week and next week is my "Ripen" week.