iPhone 7

Recently my phone has been acting up with calls. I try to call someone and they answer but I can’t hear anything and they can’t either. My music plays but when I put headphones in it doesn’t. Also when I go to turn my phone off then back on it acts like it does not want to turn back on. I have to reset it a few times for it to actually turn back on. Ever since I updated to iOS 11 I’ve had problems.