I have a burning sensation when i pee about 5-10 minutes after ejaculation. i only ever feel this burning after ejaculation, i pee pain-free the rest of the time. is this normal?

Yes, what you described is a normal happening. 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 vaccine. Wish you good health! Safe sex: https://www.hopkinsmedicine.org/health/wellness-and-prevention/safer-sex-guidelines