 [ Symptoms ] something wrong with my head  hello over the past few days i have just been feeling weird it is not really a headache tho i am prone to them but my head just feels funky like there is a sense of lightheadedness it is hard to describe and i can not seem to focus like if i am reading or watching something it just comes over me also days prior to this i had a very sore neck for a couple days which i often get but that subsided i am really worried i have a brain tumor or something i am always imagining the worst case scenario [ Disease ] if it is not constant i would get your blood sugar levels taken sometimes low or even high blood sugar can cause headaches and to become lightheaded low blood sugar symptoms include  shaking fast heartbeat sweating anxiousness dizziness hunger weakness or fatigue headache and irritability high blood sugar includes being thirsty frequent urination hunger blurred vision tiredness and nausea if you believe it is low blood sugar try to drink some orange juice or eat a candy bar and if it doesnt go away then contact your doctor although i do not believe that it could be a brain tumor