Tara I'm really sorry to hear what you are going through 💐
I know all workplaces differ, but in mine, there would be great sympathy for someone dealing with this.
Two months is quite long, so given that you are still struggling, I would explain to your boss. There is no need to go into excessive detail, but unless your boss is devoid of emotions, he will have empathy.
That said, it's also a good idea to have a plan for change. I would be encouraging my staff to avail of our Employee Assistance Scheme. Do you have something similar? This provides for a number of free counselling sessions.
It may also be that you would benefit from time off?
Regarding the report, clearly that's not ok. I would totally understand if one of my team explained their reasons for not doing it. However, I think you need to make it clear if you are able to do the report, and are you sure it won't happen again?
If you feel you can't do some parts of your job, you need to be honest about this and consider time off.
As a manager I would be keen to support a team member, once I could see they were genuinely wanting to addres this.
I hope things improve soon.