No matter what your legislative asshole's (House or Senate) views on guns is (and I live in the deep blue state of Maryland), they all have constituent services weenies to handle inquires like this.
In my case, where ATF just kept saying "pending", when my Senator's office inquired then the ATF came back and said I was on hold with the FBI NICS for three months...and yes, there is no other way to find this out as the FBI doesn't publish any contact info and doesn't want your phone calls or emails.
ATF said contact FBI as if that was feasible.
Long story short, ended up that after pinging the FBI, my NICS check was cleared within a day then ATF issued my stamp within a week.
May/may not work for others.
I was a USAF officer (yeah, back when we were still flying biplanes), have held security clearances as both mil and civ, and have NO FBI file whatsoever. Nonetheless, I tired of the FBI NICS shenanigans (yeah, put on NICS hold routinely, lifted from 15 minutes to next day...assholes) so I got a UPIN. Haven't used it yet, but if I get put on hold with NICS with a UPIN...which is a pre-clearance process, right...I'll prob go on war path with Senator again.
Fucking government at work. sigh