You're far braver than I would have been in your place; but then I guess that's why you're a cop. Thank you for your service.

That said - have you considered therapy? It's entirely possible that you had some really bad hallucinations when you entered that house, and the effects are still with you - with the bad dreams, and so on. As other posters have said - there could have been so much fungus there that you were essentially drugged.

Keep safe, and please, speak to someone.

Minor point: did you/the department ever bother getting the mould you found at that place analysed?