Identifying the cause of your compulsion to talk and trying to find ways to redirect that energy/feeling or change it would be much better than becoming an introvert again.

Are the compulsive things you say relevant to a situation? Random? How do you know people are actually annoyed by you? Talking a lot doesn't automatically make you annoying, if what you say strongly supports the topic- or if you start the topic- it is something people want to discuss and they will also engage and you wont be left hanging.

unless what you say is difficult to engage with or out of place, too abstract, or unrelated to the orinigal course of the conversation, and also if you repeat things, etc. If a lot of what you say ends up being rather close ended, it can also be difficult for others to continue the flow of a conversation and you end up the only one talking.

Do you have any problems with your attention span? People with poor attention spans, or people who think several thoughts at once are more likely to trail on in a conversation and lose peoples interest in the conversation as a result.