Hi.. Thanks for contacting practo for health query. I am Dr.Shanmugavadivu a senior physician answering your question. You are a male who feels dizzy on getting up and you have neck pain. I feel it could be either a benign positional paroxysmal vertigo which is a non dangerous condition because of mal positioning of ear canal. Your neck pain and feel of blood rushing up makes me think of cervical spondylosis as second diagnosis. The third thing I would consider are  general ailments like high BP and diabetes