Deficiency help

On further inspection looking at bottom leaves you may have a soil ph problem or over/under feeding cal/mag but try do some more research to properly diagnose the problem to be sure ✌️🏻🤞🏼

Simple answer over watering by the looks of it should recover completely dry pot out lift it slightly so you know how heavy it is then do the same wet then you should have more of an idea how much an when to water ✌️🏻

Before trying to tackle a nutrient problem start from the basics. It seems like a watering problem. You don't want to over water or underwater. It is very easy to over water even for experienced growers. Your plants shouldn't be drooping like that. In fact the leaves at the nodes should be angled up at a 45 degree angle. I water slowly until I have runoff. Then don't water again until the soil is almost completely dry. You can tell by lifting the pot and seeing how light it is or sticking your finger into the soil (should be dry). You want to be PH adjusting your water every time to 6.5. If the soil is soaking wet right now wait for it to dry. Just give it PHd water for a week. Then after a week mix your nutrients with your water (only half strength) and adjust PH to 6.5 before watering.

When the lower leaves turn yellow, it's either due to a lack of some nutrients, specifically magnesium and calcium, or poor pH control. I would try watering it more while keeping a close eye on the pH, as when there is a water or nutrient deficit, the plant starts using the nutrients and water from the lower leaves. If the problem persists, the best thing to do would be to buy a product that provides magnesium and calcium. I hope this helps you out.