Stopping others from cutting you off
Some people might be unaware that they’re interrupting you. They don’t mean to hurt your feelings, but they just have a lack of awareness when it comes to social cues. You could snap at the person to get them to stop interrupting, but this will only make the situation uncomfortable. There’s an easier tactic you can try.
Continue speaking as if nothing happened. That’s right, speak as if the interrupter hadn’t said anything. Continue at the same pace, the same tone, the same everything. Eventually, the interrupter will feel awkward (the only one who will) like they’re being ignored. That’ll shut them up long enough for you to get your thoughts out.