Feeling ignored around people

This is something that has me thinking for quite a long while. It isn’t just feeling ignored around a group of people, I mean being ignored in general crowds. Let me explain further. I have come across so many times that staff ignore me in shops while I’m waiting to be attended, having people arriving later than me have been prioritised. As well as being bumped around while walking because people don’t perceive me at all. But I have also felt ignored in a group of people, like I give some input, they listen (I guess, I hope) and kept talking about what it was being said without taking into account what I just said. Over talked too, like somebody will step on my speech so I get quiet because it’s impossible to listen to two people at the same time (and the other person will talk louder than me). I tend to feel like this with different groups, both family and friends. Though this doesn’t happen much around other people with other disorders such as autism. Am I missing something? Do I have a problem?