“I’d sit on my bathroom floor, nursing my baby Edu at 3 a.m., and speak to my brother in Spain, and I’d cry to him, nauseous about it all,” Baldwin writes. “He’d try to lighten things up by saying, ‘Can we just stop for a second and talk about how nonsensical this is? You’re speaking to me in Spain, where I’ve lived for most of my life, in Spanish, about the validity of our…