Nitro toxicity and calcium deficiency. Should I flush?

Usually when I see toxicity and deficiency at same time it is a sign of not enough run off at watering. Which causes a build up of salts in the soil from fertilizer. This can also cause big ph spikes in the substrate. Plus in flowering the npk ratio is 1-2-3. The spotting you are seeing is actually a potassium deficiency. I can clearly see minor to aggressive signs in your pictures of potassium deficiency. From discoloration to burnt straight tips then it goes to spots. If I was you I would change the ratio of what I am feeding, and check the run off ph. Potassium is the most important over all nutrition in the plant. Vegging npk ratio is 3-1-2 also for future reference. I think clearly it is just a improper diet for the stage of growth. She is in heavy bulking, and starving for lots of potassium and phosphorus to develop the colas and make them potent and dense. Too much nitrogen also hinders bud development in flowering. So hopefully this helps, and it should solve your issue.