Help please.

Hello buddy, You do NOT need to water. And no this is NOT nutrient burning. You want the top 2 inches (5 centimeters) from the soil to be completely dry before watering again. When you water you want to give till 10-20% runoff. This is the perfect water/dry ratio. Happy Growing! 💚

If you overwatered last week, I wouldn't water again yet. The size bag you are in for that size plant will keep it going for a while. Nute burn usually happens at the tip of the leaves, so it's not that. It can happen is you accidentally spill some feed on the leaf and as the water in the feed evaporates, it becomes very concentrated and can burn your plant. Sunburn is definitely a thing. If you have water drops on your leaves when the sun is out they act like mini magnifying glasses and burn little spots. What you have is definitely not from the sun, because that is quite difficult to achieve when the plant is inside and not in the sun :P My guess is you spilled feed, but that is nothing to worry about. Other than that your plant is looking very healthy, so let the soil dry for a while and she will perk up again.

Plants can get "sunburned" from too much heat or too much light radiation, but thats definitely not the case here.

Hey. its not "sunburn", that is a myth. Only cold water drops on warm leafs can cause minor cell damage, or if you have high mineral cotent it could leave a mark from dried out minerals, but it doesnt look like that in this case. I think you just have to water you plant, ive seen you underwatered it recently and it grew a lot since then, so her thirst is gonna increase more and more now. Give her a good full watering! happy growing mate 😊

Hey, That doesn't look like nute burn to me. Maybe it could be "sunburn" when water drops on leaves. Only water in a large amount that the soil is fully wet and the drainage is draining. And then wait until like 4 cm are dry of the top soil