Backpain and diziness. Or just anxiety?

Constant dizziness since last 45 days n also had spells or headache n also had pain in tendons in the back of ankel n left shoulder joint with headache which i used to think as brain tumor but the GP told me it's anxiety without any tests. Since last 3-4 days i have backpain n pain in legs (burning kind of pain) with dizziness n constipation which i searched on internet, it shows it as a symptom of blood cancer. I've found any swollen lymph node in head n chin area n also i never had fever or vomitng. Also I've 3-4 white painful small pimples in neck near my beard n eyebrow. My parents aren't worried about it n asking me to divert my mind to my studies rather than worrying. I visited another hospital whr neurosurgeon suggested me to visit the neuropsychiatrist for one session without any tests. Can it be something serious or just anxiety? Kindly help me out i m vry mch worried n stressed n unable to focus on my mains preparation.