mommia22, its written in a few places strongly not to cut both in one day, but the sharei tshuva quotes from someone, that one does not have to be makpid on it. So if its so torturous maybe you can rely on that.
And about ‘gathering’ all the nails, the gemarah in nida says that one that throws it around is called a rasha ch”v. And that if a pregnent women steps on it, its dangarous for the child R”L.