Being through this one, it’s tough but if it works it’s a superb thing. Daughter now coming to 5yrs. Luckily you have 3 goes via NHS ours was only 1 so added some pressure. We had some counselling which helped us both through the mental challenge. I personally gave up coffee, reduced MTB, showers only no hot baths and tried all sorts of things to help my count. I had acupuncture which may have helped me, who knows if it actually helped but it definitely helped with the mental side, gave me the reassurance i was trying. We never got an answer on what may have prevented us naturally and we found the process pre IVF quite stressful.
Lots of talking with each other helped us through it plus a few close friends to just talk, not really details just basics which helped with the mental load as well.
Good luck