Severe gum disease causing concern

Because I resemble my father, my gums are weak. In my 30s, one day, when I eat something cold or hot, my teeth become sensitive. I thought it was natural with age, but it worsened over time, so I went to the dentist and was told I have periodontitis. If this continues, all my teeth will fall out before I turn 60... Sigh... I think I overworked my body because of work, making it worse. They say periodontitis is more frightening than cavities... I'm scared. I wonder what treatment I should get at the dentist... Do products advertised as strengthening teeth help? I'm worried. My teeth have become more sensitive than last year... At this young age, I might need dentures...ㅠㅠ