Can's see the multiple recipients I sent a text to...?

Hello,

So I sent a group text to about 18 people on my Nexus. This is the first time I have done so. However, I wanted to check and make sure I sent it to everyone I needed to but I can't seem to look at all the people I sent it to. When I click on the text I sent, it lists about 2 people then has "...". I can't seem to find where I see all the recipients (and I'm a teenager who usually knows what they're doing on a smart phone haha). So does anyone know where I see who I sent it to? The only settings I have is to add subject, insert smiley or delete the thread :( Thanks so much in advance!!

Brittany