Nail pitting or not. Thing to happen?

I am very concerned about my health after seeing my nails. As you can see in the pic, I have one dent in 3 nails. Each in one. It's not noticeable until i look closely. I searched about this and found a term called nail pitting. But the causes of nail pitting has scared me now such as psoriasis, alopecia , and other two rare disease. Since then I am trying to check any other symptoms. But found none. I have no skin problems like rash or anything. Never had any. No joint or bone pain. Though my left hand fingernails and thumbnail have more shine than right one. You see my nails in pic and tell me if there's anything to worry about? What is the cause of it? Is it actually nail pitting or something else? Is it due to vitamin deficiency? Is it normal thing to happen?