Do all old sperms clear out from the women genital system through periods and vaginal mucus after some days or weeks?

Yes. Sperm dies in 4-5 days and menstrual bleeding will clear out sperm, dead or alive, from the genital tract. 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!