Pressure of ttc

Hi ladies. I just wonder if anyone is in/or has been in the same boat that could advise. Me and my husband are in our 4th month ttc. From the beginning I've been feeling the pressure and feeling so much stress and anxiety. I'm obsessing over it and I can't seem to relax myself, each month so far it's gotten worse, last time I got AF I cried for hours. My husband sees how anxious and upset I am getting and it's starting to affect him. We are in the fertile window right now and he has been having trouble maintaining his erection. Yesterday after trying the BD eventually abandoned the attempt because he couldn't stay erect. Firstly I feel terrible that my stress has been picked up by him and now he's feeling more pressure. I'm also worried that this is how it's going to be every month and it will be more and more pressure each month. How can we try and take focus away from the ttc element of the sex and just relax and start enjoying it again? Sorry for the long post