Hypochondria since 4 year. This!

Hi doctor, I am suffering from hypochondria anxieties from last 4 year and only fear of cancer disease. I have developed this fear just by reading google and while helping cancer paitent. There is no incident of cancer in my family. I have started my psychiatry treatment 8 month and started taking peroxitine and cloeanz and oleanz. Now I am taking peroxitine 37.5 mg and oleanz sometime 2.5mg. I feel normal till medicine work but again start fearing after sometime. I check my body for lumps whole days, watch my stool for any blood, measure my temp for any fever increase, measure my weight 10 times day. I am getting mad day by day. I am just 32 , recently married. It is affecting my life. I am verge of taking some wrong step. Please advise how to stop fear of dying from cancer. I realy need help. Just dnt treat as question of stranger for god sake .. please suggest as on frnd...really need help...crying while writting this