Invitation Mishap Reassurance

So I had my mom and sister help me write out and stuff our wedding invitations last week. My sister and I wrote the addresses and my mom stuffed the envelopes with the invitation and detail card. Well yesterday my other sister received her invitation but there was only the invitation with no detail card. Without it, the guest would just be invited to a ceremony with no instructions to RSVP and no mention of a reception. I counted the remaining invites and cards and we have 13 extra detail cards. Obviously, my mom feels terrible. And I feel terrible that she feels terrible. But I can't help that at the same time, I'm mad and blame myself for not double checking or noticing the difference in the height of each stack, or just doing all of it on my own. My mom already reached out to everyone on our side, and we found 4 invitations without the card. But that means 9 are still out there somewhere. I reeeeally don't want to reach out to everyone by email or something. If I do that, I feel like I should have just done e-vites and my beautiful invitations were for nothing. I know I'm probably being super dramatic, and I know that if this is the biggest problem in the whole wedding process, I'll take it. But does anyone have any advice or reassurance that it will be ok or been in a similar situation? I just feel like reaching out to everyone makes the event and invitations much less classy