Miscarriage, haven't told partner yet

Partner (more than boyfriend less than hubby) and I have been together for 4 years, decided to have a baby together last year, finally got pregnant 12 weeks ago.......and I miscarried three days ago. I haven't told him yet, he's in Brazil on business until Monday and I feel like I need to tell him in person. Any advice for what to say? Any advice for how to cope? I've basically been catatonic since leaving the doctor's.