Rush Appointment for Federal Polícia?

Hey all. I arrived in January 13th with a Digital Nomad visa stamp on my passport. I went through the whole process at my embassy and things went smoothly.

Per instructions, I set an appointment with the Federal Police in SP to validate my DN visa within 90 days. The first appointment I was able to get was on March 17th.

I went to my appointment with all my paperwork and was told that, due to a clerical error on the part of the Embassy, I would need to go to another office in SP to rectify some field in the application, and then make another appointment with the Federal Police to validate my visa.

I've already begun the process of rectifying my paperwork and hope to have that done within a week or so. My main issue is that the next available appointment as of checking today isn't until May, well outside of my 90 day window to check in with Federal Police for my Visa.

I contacted the Federal Police via email as instructed by the person who checked my paperwork, hoping to secure some kind of emergency appointment. No, it isn't an emergency, and I don't expect special treatment, but in this case I was hoping to find a way in quicker especially given that the error was not my doing.

They were unhelpful and instructed me to continue checking the appointment scheduling system for more dates to open up.

Further complicating things, I need to leave the country for a few weeks in mid May, and I'm wondering if leaving and coming back before getting this all squared away is gonna jeopardize things even more. The appointment I have set is May 9th, and I need to leave a week or so after that. My thought was that the purpose of the appointment was something like getting a residency card, and if I leave without it, I won't be able to get back in.

So, I have a few questions for anyone in the know.

1. If I am for some reason not able to make an appointment with the correct paperwork within the 90 day window, is that going to affect my ability to fully validate my DN visa and stay the rest of the year?
2. Is there any way that I can make an appointment sooner, anyone I can contact or pay?
3. In the online scheduling system, is there any chance that as time passes, more appointments will appear in the system SOONER than the ones currently posted? (Ie the first available date as of today is May 9th, if I keep checking could dates in April appear)
4. Is simply having visited the Federal Police within my window, despite the appointment not having been a success, sufficient to allow to me to continue the process outside of the window?

Basically my worry is that if I am outside the window I will not be able to get my DN visa as intended. Especially so if I leave the country and try to return before it's finished.

Thanks for anyone who can provide any helpful information or links.