What Causes Fatigue Along With Blurred Vision And Head Pressure?

I ve been dealing with fatigue for a few years, I ve been to many Dr. and they couldn t find anything physical so they thought mental. Mentally they said it was normal stresses, anxiety & depression. My symptoms had or has been fatigue, head pressure, blurred vision, lack of focus and drive. I did have a few a few positive strains when tested for lyme and showed an IGG of a past Rocky Mnt Spotted Fever, but didn t meet CDC criteria. Could I still have co-infections relating to Lyme and my doctors don t what to acknowledge it? or What else could it be. It has been going on for too long and I haven t been able to really work now for 2.5 yrs. and was turned down for disability.