Definitely go and see a doctor and have your fears either confirmed or denied. Worrying about having cancer is terribly debilitating. You are 18 and have the best of life still to come. You have a 50% chance of not carrying the gene. Always try to find the positive because negativity will kill you. Ask to have genetic testing done to be sure either way. If you find out that you're safe, party, travel, love, find your purpose in life and live a full life in honour of your brother and your father. I wish you well and hope you can find the courage to approach this head on and get the answers you need. Good luck. x
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