Confusing friend situation please please help?

okay so i have a group of friends, three other girls and me, that i hang out with. two of them (emily and penny) went to camp just last week. so they posted all their pictures and looking at them really made me want to go to camp, so i texted them individally once saying something like "im jealous i bet camp was so much fun! im kinda sad i didnt go!!" so then yesterday, we had a a sleepover with all four of us and i looked at pennys phone and her message chain with emily. penny had sent emily a copy of my message that sent about being jealous of not going to camp. and emily responded saying "uuggghhhh thats so annoying!! she only cares cause we went together and she didnt!! she would give a flying fish if i hadnt of gone" and then penny agreed!!! so basically i am wondering if i should tell the other girl in our foursome, maddie, about this whole thing about them thinking im annoying. should i? or am i overreacting and should just let it go? thank you so much for reading this please respond!!!!