Lightheadedness coming repeatedly. This.

I am 23 year old female I am having lightheadedness a month back for 2 weeks and consulted a general physician and he did cbp,serum creatinine, RBS and ECG and the results are normal and told to reduce stress I was fine after two weeks,suddenly 5 days back my lightheadedness was back,,yesterday I went to ENT he took the X Ray of PNS,Spine Cervical Lateral and said that my one of my cervical bones are compressing one another and told me to use  neck belt for 2 hours a day and meds I am concerned about any neurological issues. I'm really stressed as I was a very happy and lovely person but the stress of this killing all my happiness I really had a fear of cancer because I heard that my paternal grandfather had died of tumor(I'm not sure whether malignant or benign) I humbly request you to please help me in this. Thanks & Regards.