confused 😞

Sarah-Jane • TTC 16 months💏We did it🤰🏽Sophie born 10/7/18💕
I've been with my fiancé for 6 years and past 2 months we have been TTC (not obsessing about it but if it happens it happens) well the past 3 weeks or so my fella loses his hard on (not every time) but prob every other or 3rd time we have sex. He seems to be ok with BJ (although a few times he's lost it then)
We have a very active and naughty sex life and I never let things get dull or samey. I try and keep myself nice and everything in our lives organised and perfect but I've been feeling so low wondering if it's me or if he's seeing someone else, I'm a bit confused and what makes it worse he just doesn't even talk to me, it happened last night and I was so annoyed I just got up and went out the room (never did that before, previous times I would just coax it back to life 😂) but last night I felt it was me I was ugly and that's why he couldn't keep it hard? He was shouting at me saying 'I'm not a porn star I can't keep it hard all the time' I understand that totally but why all of a sudden is it happening? I never pressure him or ask him loads of questions about it but just feeling so down today 😞