Spoiled Gender Reveal

So yesterday we had our big 2nd trimester ultrasound.. First thing we discussed was Me and my husband did NOT want to know it was a suprise for us cause we're having a gender reveal party but Grandma did (His mom) The person we had taking the ultrasound agreed to let us know when not to look and she would let grandma know what it was but put it in an envelope and seal it so we could pass it on to Auntie to be to make "the box". Anyways so we started she checked the heart,kidneys,etc. then moved on to down there she said baby had legs crossed so I need to get baby to start moving by moving around a bit and we would try again. So i did. She then checked the spine and other important measurements and then it happened. She said "Well there's definitely no boy parts there... Yup definitely female. It's a girl. My husband's face was like 😮 and i knew he started to say you weren't supposed to tell us but all he got out was a sound we were in so much shock we couldn't say anything a few minutes later i guess it hit her what she had done and she apologized. We just kind of said it's okay.. I was still in such a daze of what just happened because we discussed and planned so carefully to find out with everyone else and we were soooo convinced it was a boy Later on it did kind of upset me now that this won't be a suprise as planned and we have to pretend to be suprised infront of about 50 plus people and it sucks (i am happy baby is healthy and that's all that really matters and i may not have got my boy but she's our princess all the same) I just had to rant somewhere cause what happened is staying between Me him and grandma but how would you have reacted? Has this happened to anyone else? This is our first baby.

Update: If anyone else has comments about how i should just be thankful about babies health i clearly said that's what mattered to me in original post.. I posted this to see others experiences or reactions if this has happened to you. I think some of you misunderstand where I'm coming from I was just expressing 1. My initial shock and 2. Mostly just disapppintment that we won't be able to capture our initial reaction on camera to keep forever but my little girl being healthy has been my worry from THE DAY i saw those 2 lines. Our first child would of been due tomorrow 3 years ago so I understand how much it hurts to lose a baby... Anyways I guess all i can is things happen for a reason and as far as the Tech we had I understood everyone is human and makes mistakes That's why we simply said it's okay and went on with our shock of it's a GIRL.