Feeling frustrated

So today I feel frustrated, but mainly because I know I’m being selfish.... I have children to My ex husband and never had to think about not getting pregnant it happened so quickly.

I’m now trying with my new partner who has no children and I’m becoming frustrated with it, where on month 4 now of trying I’ve been doing ovulation tests so we both no when my fertile time is but it’s like once he knows I’m fertile he really struggles to finish 🙈 i think he’s putting to much pressure on himself which is now having an effect on me... anyone else been through this?