The death of your father alone is enough to not make you feel like sex ATM, I know I wasn't in the mood after my Dads death. Dh never tried to initate, he didn't sulk, he didn't make me feel guilty, if he did, I genuinely think I would leave him.
I know it's an overused used word, but he an entitled cunt, he doesn't think he should masturbate cos you're there? He'd have you wank him or give him a blowjob he knows you don't want to give because you're worrying about your health and grieving for your Dad?
I'd never want him touching me again. He doesn't sound like he cares if you actually want to have sex, and his annoyance is coming from your reluctance to put his dick before you're health and grief and agree to service him in other ways. He doesn't get automatic rights to your body just because he's in a relationship with you, and there's a word for men who coerce women to consent by being moody and sulky and giving them guilt trips.
I think if you weren't having the treatment and were not in the mood due to grief alone he'd be less sympathetic, as in, he knows he can't blame you for no sex due to the cervical, but if that wasn't happening , he'd be thinking you don't have an excuse for saying no in the same way he thinks you shouldn't be saying no to servicing him with your mouth. IYSWIM?
He doesn't give a fuck how you are feeling, he's prioritising his wish to access to your body over his concern for your comfort and wellbeing.