Numerous factors, including stress, poor sleep, migraine, vitamin deficiencies, uncontrolled blood sugar or blood pressure, eye problems, thyroid issues, or other medical diseases, can produce persistent headache, blurred vision, fatigue, joint pain, memory problems, and irritability. You should obtain a professional medical check-up instead of self-medicating since you have multiple symptoms at once. For blood pressure, blood sugar, eye exams, and blood tests such as vitamin B12, vitamin D, thyroid, and haemoglobin, please consult a physician. Seek urgent medical assistance if the headache becomes severe, you have weakness, confusion, vomiting, or sudden vision loss.