Am I A Mother? Mothers Day 2017

Cam • living the life I've been given.
My partner and I have had 3 separate miscarriages last year. He says I'm a mother to all of those babies. Just like he is their father. Is it wrong to feel like I am a mom? This Mother's Day he wants to celebrate with me. But, I don't even know how to start. What do y'all think? 
I lost my babies at 8, 10, and 13 weeks.