Instagram, Voice Memos, and Snapchat sounds like static when recording.

Hi. I got an iPhone 6s and decided to try recording a video on Instagram. When I heard the preview, it sounded like complete static. I instantly knew something was wrong so I tried another test with Voice Memos. I tried speaking into the microphone directly it also sounded like static as well. So now I knew that Instagram and Voice Memos use the microphone closest to the headphone jack at the bottom. Unfortunately, the same turned out for Snapchat. The normal camera app sounds perfectly fine. Another problem I have is that the speakers sound a little bit distorted. All I did was use it normally like anybody else would. I need help.