Ive starting having breast tenderness 5 days before my next period is supposed to be due. usually if i have breast tenderness it happens a week or so before my period. is the breast tenderness 5 days before period normal then in my case?

What you described is a minor variation in your normal routine. A couple of days this way or that is within normal limits for a menstrual period. 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!