nice, caring DH would have been focused on wanting to help you with these thoughts and fears, not using them as a stick to beat you with. Ergo, he is not part if the solution, which straight away leads to the possibility, as others have said, that he is part of the problem
This.
And I want to add I had intrusive thoughts. Worse when I'm stressed. Much worse. Both in severity of the thought, frequency of them and how distressed they make me.
There was a really long thread about it a while ago, loads and loads of people 'admitting' their intrusive thoughts, but it might have been in chat so I think it has vanished.
Oh and seriously, go to the doc. You want it on record that you have sought help. The ones that ss are interested in are people who have a problem but are in denial. There aren't many local authorities with the time or budget to pester normal people who seek help for a common problem, and monitor their own health and get help if and when they need it.
The doc won't prescribe pills if you don't want them. You might be offered a chance at a therapy if you want, or you can just say no to everything, and use the visit to say that you feel you are managing ok, but want to know what to watch out for. Every doc I have spoken to has been great with this sort of thing.
Good luck OP. You sound like a nice normal person who is being goaded and put down by a total twat.