as you said he's stressed. Imagine when you get stressed what you expect from him. how you expect him to behave how you expect him to support you. Now do the same way with him. He might need more support and attention than you need when you get stressed. Understand him. Ask him if you can help him any way. Politely request him to share what he thinks so that he'll get some amount of relief. Looks like he's not harrassing you he's frustrated.

I am also very stressed about job i am unemployed. And feel like useless guy. I am irritated with everyone around me. If he always irritated with you than there is a problem with your relationship. If he is only irritated with job than you should listen him, motivate him, help him to achieve something.

keep calm.. if people are frustrated, they ll shout on their loved ones.. he need's peace.. don't talk to him for few day's, i mean just help him.. if he comes home, try giving him a towel if he is going for shower.. put food in plate if he sits on dinner table.. cover the blanket if he sleeps.. don't greet him like welcome home and all, keep ur mouth shut.. yes.. even i shout at my mom when she starts speaking as soon as i enter home.. don't disturb him till he apologies u, he ll definitely do it if u r caring and understanding him.. u start writing sticky notes and paste it whr he can notice.. stick gud mrng note on a mirror, stick have a smile note on a coffee.. stick a note saying u need a break, tel him to take few days off and plan a trip 😍