What are your methods for conceiving ?

Hi ladies,

I've been trying to conceive for the last few months and I haven't been successful.

I track my periods and know that I have a 27/28 day cycle. I use three different apps that tell me I ovulate on different days. I've had sex on my fertile window, and ovulation day .. but still no luck. I wonder if I'm doing something wrong, or may be I actually ovulate earlier/later. Should I be hitting the sac right after my period is over, consistently? Can you ladies give me some helpful feedback on what you've done to successfully become pregnant? It would really help me :) much appreciated