My dear don't worry. Sri Lanka is a safe & beautiful country. Go to Nuwara Eliya (hill country with tea plantation) & Kandy (Buddhist temple). Enjoy the beach from Wadduwa to Galle. (Down south) Don't forget to go on a wildlife safari. (Yala, Udawalawa, Bundala or Wilpatthu). You can stay in a wildlife bungalow as well. (you need to book in advance). Then visit some ancient & historical places like Sigiriya rock, Dambulla temple, Anuradhapura, Polonnaruwa & Kathragama.
Enjoy your trip..........