I did hiv combo test 3 times at 33 , 37 , 45 days all these test results was negative so , should i repeat ? or it is conclusive?

It is more or less conclusive. To be sure get a HIV nucleic acid test at 6 months after exposure.For healthy diet: http://www.choosemyplate.gov/., exercise 30 minutes/day, drink enough water daily so your urine is mostly colorless, have safe sex, no tobacco alcohol weed or street drugs. Get HPV and Covid vaccines. Wish you good health!

Do a final test at 6 months. https://www.hiv.va.gov/patient/faqs/testing-after-unsafe-sex.asp