Our Little Peanut . . . M&M

According to the measurements, we are 7 weeks along!  It's incredible to me that I had no idea that I was pregnant for 6 whole weeks!  We went in to the doctor for bloodwork & an ultrasound this past week, & so far, everything looks great!  My numbers were healthy, as was our little one's heartbeat & placement.  We're still in such awe over this whole surprise!  I'm trying to think of a cute little nickname for him/her, because it can sometimes become a bit of a tongue twister to say "him or her" everytime I want to talk about him or her.  (See what I mean?)  Come to think of it, Michael might have hit on a nickname this morning, quite by accident.  I was ravenous before breakfast, & I patted my belly & said, "It's okay, baby, I'm fixing to feed you."  Michael chuckled & said, "A peanut M&M is bigger than our baby right now!  I don't think he/she's eating that much!"  I've heard people say "peanut" a lot, but "M&M" is new to me!  I think it might work!  ;-)  What say you?