Concern about symptoms. Of brain tumor?

I am a 20 years old boy .from last 6 months I am feeling physical symptoms like 1, a tight band wrapped around head anytime,  every time 2 pain and tightness in the neck 3 dry mouth 4 ringing ears 5 sweating 6 nausea 7 upset stomach 8 weakness 9 a mild headache on eyelids, stuffy nose, runny nose, sneezing 10 sudden chills, shivering 11 tense muscles 12 sensation in head 13 worry to have a big disease like a brain tumour etc I have done MRI brain in January report was normal but I worried again that I got a brain tumour after January. I again have ct scan head before two days and report was again normal But I am still worrying that I got a brain tumour Please convey me that a brain tumour does not occur in a few months What's the reason for my above symptoms ?? Can I completely rule out the chance of brain tumor ???