M/27. been having tension headaches for a week or so. just moved and been really stressed and anxious. they go away when i exercise and dont get worse with movement. just feeling generally unwell. is this likely to be brain cancer? scared. thanks.

Unlikely: For piece of mind and having at least your anxiety addressed see your GP for an exam and further tests. Specifically with not feeling well in general, a variety of other medical conditions are more likely and they will have to be ruled in or out.

Need to examine: It is not feasible to provide a meaningful opinion without taking additional history, physical examination and may be some tests. It would be prudent to see your doctor and discuss if you may be depressed. Counter-intuitive as it may seem, exercise may help. Start with low intensity exercise such as walking and gradually increase the intensity as tolerated. Wish you good health!