Yeah unistall an re-install. Are you on an older device? They tend to smush together. So when you access your wall you can also see pm in the background
You may think im delusional but thats just because you are jealous of my sanity *flys away on my unicorn*
Try closing the app all the way and load it again if that doesn't help delete and reinstall the app If those two don't work please email support