Feeling frustrated

My SO and I have been TTC since March.  I conceived my now almost 5 year old daughter quickly (with my ex) and I hoped it would be easy again. So far no luck. The worst part is my wonderful hubby is a busy man of many hats and often stressed.  We took a weekend to ourselves (no kids) to have a romantic weekend and BD. it was great.   I had blinky smile face on ovulation test. Last night he had a fire meeting that went late. I text him for hour and half to get home so we could relax and BD.  by the time he made it home I was practically asleep and pissed off.  This morning I had a solid face. Tried to BD for half hour with no happy ending.  We finally had to give up and go to work.  I'm freaking out inside that if we don't BD soon we could miss our prime window.  This happened last month too.   We BD many times but missed the prime days because he couldn't get his head in the game.  I can only do so much to help him.  I'm lost.  Confused.  Frustrated.  Heart broken. He's feeling the same.  He's just pulled so many ways and despite his best efforts he just can't help it. Anyone else feel the same?