I got a MRI of the brain and cervical spine, there is a 1.8 cm left maxillary sinus cyst, is it a concern?

Female, 24. Symptoms include flashes in the left eye plus a shadowy ripple effect flutter in the deep left bottom corner in the same eye, flashes occur about 20 times a day and the flutter doesn’t go away. Eye pain as well and sometimes severely, horrible head aches that make me cry actual tears. I always feel tired like I don’t get enough sleep. There are nights when I will sleep through the entire night. Or I have nights when I wake up about every hour and a half, almost exactly. My legs and feet always sore, it feels most insense when I lay down. I will randomly get very bad bladder pains. It feels like the actual lining of my bladder is being attacked. It just gets very painful and no matter how I sit or lay it hurts, I haven’t figured out a way to soothe it yet for when it does happen. I get dizzy at times, especially in heat. It’s most intense in the shower, to where I don’t even attempt to stand anymore. With this being said, I have been seen, however I am more looking for a second opinion on what to do. I was seen by a retina specialist who was suspicious of retina detachment or damage to the ocular nerve. Long story short he found zero damage to both. So I was referred to a neurologist. I got a MRI of the brain and cervical spine. The cervical spine was normal, and the brain was normal with one exception. It says on the report that there is a 1.8 cm left maxillary sinus cyst. the doctor did not explain what that is to me, nor did anything for me. I have no follow up or anything either. Wouldn’t a cyst almost an inch big inside a head strike a concern?