Fertilizer burn or something else?

You've got to start a diary here... we might be able to tell you what we see but we really can't tell you what to do about it if we don't know what you've actually done already... Did you use the foliar spray at dusk when there was no direct sunlight on her? If not, this could account for the brown spotting - the liquid would magnify the sun's rays and burn the leaves. Leaves curling down could be overwatering or underwatering - symptoms are the same. Also looks like you're giving too much nitrogen. Here's the thing about deficiencies - you need to figure out WHY you have a deficiency before you can actually fix the problem. Normally, the nutes you provide will have enough calcium and magnesium in them so the plant should never have these deficiencies - BUT if you've given too much nitrogen, this can cause a lockout of those nutes and the plant can't get at them.... same thing with pH - if the pH is not in the right range, the plant can't absorb what you are naturally giving them. You can throw a whole bottle of calmag at the plant but if you've got a nitrogen toxicity or the pH is out of range, it won't do any good whatsoever... If you had a diary, we could figure out which of these things is most likely your problem - but look there first... Since these are in bloom, your NPK ratio should be 1-2-3 and your pH, if growing in soil, should be between 6.0 and 6.2 .... get those fixed if they're a problem and the other problems will melt away. Good luck....