Hello Jessica,
I so feel for you in your situation and am very glad that Christina, as usual, has posted her expert reply with all her knowledge and experience and empathy.
I would just add that your husband certainly seems in the grip of an acute and escalating psychotic episode with strong paranoid features and is rapidly losing touch with reality (and judgement..) No doubt he is feeling increasingly mistrusting and threatened, therefore is in mounting mental and physical distress, which can't be reasoned with. (Don't try!)
Please take heed of Christina's strategies for getting help, because medication is needed urgently.
Have some Mental First Aid Emergency plans in place, but if your gut feelings say, Danger, follow them, do not hesitate.
Involuntary treatment might be the necessary beginning of recovery.
Chris from UK,
untreated family member with probable paranoid sz