I accidentally sent a voice message in a group chat and i'm really embarrassed?

I have an iphone 4s and I was in a group chat with my 3 friends on imessage and I accidently sent a really embarrassing voice message of me speaking in a American accent and when they asked me what that was I said that that was my friend and I was on facetime to her and they believed me because the recording didn't sound like me but its so embarrassing, I deleed the message but they hears it anyway and I feel like they will be teasing me about it and ahh i'm so embarrassed. They haven't said anything bad about it but one of my friends saved it, i'm so scared to go into school tomorrow. What should I do? I'm so scared. I know that this might sound rally stupid and not embarrassing but to me it is and i'm literally crying omg. What should I do? I'm pretty sure they will listen to it again after school and say that its me(it is me but I said that its my friend) i'm literally so stupid for sending it. Please help

Added (1). sorry about the typos. I typed that really fast.

How to mute/silence someone on iPhone 4?

I want to mute/silence an individual from my contact list but I don't know how to do that without silencing the phone. I want the ringtone to stay for the rest of my contacts. How can I do that?

I accidentally deleted everything off of cydia and nothing works?

I accidentally deleted everything off of cydia and accidentally press on OK. Now my iPhone 6 starts up but with only my lock screen and when i slide i can put in my pass code and use my finger ID but when i unlock my phone it has nothing there, no apps or anything. When i try to use siri it opens it lasts barely a second and it closes… Help!

Added (1). I accidentally deleted everything off of cydia and nothing works.

Why can't my iphone connect to my Wi-Fi?

I have an Iphone 4 with iOS 7.1.2 and I'm not finding any Wi-Fi, even when I rest my phone on/next to the modem. When I pull up the bottom menu, the Wi-Fi signal is greyed out and when I go to setting, Wi-Fi is off and faded and I can't turn it on.

How to eliminate interference between multiple Bluetooth devices?

I recently purchased the Hawkpeck wireless mouse / keyboard combo by Viotek. It runs on 2.4 GHz which, to my understanding, is standard Bluetooth signal. I also like to connect my iPhone to my PC via Bluetooth for music. Unfortunately, I always seem to run into interference issues when connecting these devices simultaneously. For example: when I the iPhone's music is playing, the mouse doesn't respond well and is very laggy. Or sometimes it'll be the other way around, the mouse will work okay but the music frequently skips or cuts out. Now I'm considering a 360 wireless receiver for PC gaming, but I fear it might make things even worse. Granted, the mouse / keyboard combo was only like $20.00 so it could be a simple case of cheaply made product. If I invested in a better mouse / keyboard set, would that solve the issue or at least minimize it? Or perhaps there's some setting or trick to making all my devices play nice?