In our joint family, my MIL and mother always said not to overthink the calendar and just stay happy. But medically, the 12th to 16th day after your period starts is the main conceiving period. Just keep a track and don't let family pressure stress you out!
Your best window is the 3 days right before ovulation and the day of. Sperm can live inside for up to 5 days, so having intercourse during this time gives you the highest chance. Buy some ovulation strips to find your exact fertile days.
Look, it's simple science. Your conceiving window is the 5-6 days leading up to ovulation, which usually happens 14 days before your next period. Track your dates properly instead of guessing, and don't stress over it.
The most fertile period is usually 5 days before ovulation and the day of ovulation itself. We tracked this closely before conceiving, and even though my delivery ended up being a C-section, the journey was so worth it. Just track your cycle properly.
The conceiving period is generally during your ovulation window, which is around the middle of your cycle. Keep a calm mind, pray, and trust God's timing. Everything will happen beautifully when the time is right, just take care of your health.