Getting cut off when trying to join conversations
I was in a meeting at work where my colleagues were discussing a project, and I ended up getting repeatedly cut off/drowned out whenever I started talking. I have no drama or hostility with any of these people, so I assume it was unintentional, but it was still humiliating. I've noticed that this happens to me sometimes during group conversations with friends as well. To me it just feels really disrespectful to start speaking at the same time as someone else without acknowledging the other person and giving them a chance to join in. That said, I don't think there's any way to express my frustration without coming off like an asshole, so I'm at a bit of a loss regarding what to do.
Do I need to be more assertive and just keep talking over the other person? Is there some polite way that I can express my feelings about this? Am I just being too sensitive?