It is hard to say as we are all so different in how we metabolize these things and how we react to them.

Brain zaps are normally associated with withdrawal. Meaning you stopped or reduced dose on one. If you go off of one do a very slow taper to be safe.

Trazadone is an older tetracyclic antidepressant normally only used for sleep these days. Personally I don't think it is great for depression but like I said we are all different. I don't think it is known to have a real bad side effect profile.

If it were me I would stop the trazadone gradually and then see how it goes. Are you taking the trazadone for sleep or depression? You are taking three antidepressants all of different classes. In that case I have only seen trazadone used for sleep.

Trazodone: MedlinePlus Drug Information

Trazodone - Wikipedia, the free encyclopedia

If you are having unacceptable side effects then you don't have to take it. I guess you have to start with one and then see to know for sure.