always worried about my parents.?

I recently got married. I'm 25. Our marriage hit some hardships, but things are better now my parents were there to support me. They helped paid for most of my wedding because they wanted too and said I was a great daughter. Recently I think about them a lot & how much I love them. I will call & text them I love them or keep calling to make sure their okay. My is 62 & dad is 57. My mom is in good health, but my dad has diabetes. He's been sick recently. He lost weight for his health. I constantly worry about them. I cry thinking about them dying the thought of losing them. I cry every once a week it's just terrible feeling. I love them so much. I don't have a bunch a money for them. I'm scared to tell them because the last time. I worry a lot. I had a fear of my nephew after I got married of him falling down the stairs & nephew. He's 2 now. I would call my sister making sure okay. I got panicked every time he went near stairs & cry. I'm afraid of heights. Sometimes I have nightmares at night & my husband wakes me up. I worried about my husband too. We recently bought an 8 week puppy a week ago. Now I'm starting to worry about her too. She helps with the pain of me being scared of losing my parents. I think something wrong with me. I'm scared to tell my husband. He knows I worry. I only lived with my parents before marriage. My 3 sisters don't have this problem. Why me it's so unfair. I do enjoyed my family I just am scared of losing them. Especially my parents.