Trying to conceieve

I’m having difficulty climaxing and my partner and I are trying to have a kid. I have no issues when I masturbate. It’s not like I never climax with my partner. We do have a lot of sex though and I’ve found when we are apart for a bit, it does help me climax when we reunite. We live together though so we’re always together. The pressures of needing to climax during the right time of the month has been difficult on myself and for her. I don’t want it to affect our relationship but feel like it’s heading that way. Anyone going through the same situation? Any advice that has helped?