Ugh, what day do I do It?

So my doctor's say to "get busy" on days 10, 12, 14, 16, 18 of my cycle. For the best chances of conception. The <a href="https://play.google.com/store/apps/details?id=com.glow.android">Glow app</a> says my ovulation day is day 11. How accurate is the <a href="https://play.google.com/store/apps/details?id=com.glow.android">glow app</a> really. My test strips read Lh surge. I want his swimmers to replenish. Really I don't want this stress. I just want a baby.