i'm not good at identifying pest-related stuff.. so hopefully someone canchime in if it is that path.
as far as nutes, it's difficult to know. You can use my nutrient spreadsheet i have hosted on google drive shared folder. it is in my GD profile comments. Lots of good videos on related things too.
So, that will help you know what you are adding. It lets you know if things are available or not.. and if oyu see a symptom of that particular element, you know it's more likley pH or nutrient balance related.
Many of them compete for the same bonding sites inside the plant. it is all about shape, electronegativity and some other fancy stuff i don't have a great grasp of, but it is reality. the majority of problems are due to too many nutes or improper pH -- simple fact. People (not you but general trneds of behaviour) don't like being wrong, so it's usually blamed on something else other than their own behviour.
i only say that to instill a good perspective.. observe, wait and see, be informed about what you do and take notes of when you do it. this will all help deduce problems with the leaft chart, nute caclulator and a few websites. growweedeasy has a good symptom checker, fwiw. i think ihave their leaf chart linked in my profile comments, but not sure of the source anymore.