I keep thinking and worrying i have a life threatening disease like cancer because of minor things because i gave health anxiety is there any way to help?

Yes: Get a good general evaluation by Primary care physician !See a psychologist for therapy and if needed a psychiatrist for medication to help with anxiety stress and obsession

Yes: Health Anxiety can really damage your quality of life. If you are serious about dealing with this, then see a provider who is skilled at Cognitive behavioral theraply.

Yes: That is the curse of having health anxiety. Normal bodily sensations and abnormal bodily sensations all are perceived as signs of illness... making it very difficult for either the patient or the doctor to tell when the patient is actually sick (other than suffering the sickness of health anxiety). The patient must teach himself which of his pains, his cramps, his sniffles, etc., are normal.

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!