Adding a pause to audio track in Adobe Premier
You can split audio tracks (and video tracks) by selecting them and pressing Ctrl + K. If your audio and video tracks are linked, holding "Alt" and selecting just the audio track will select only the audio track (and not the linked video track). After you have split the audio track between paragraphs, you can move the latter audio track out 3 seconds (or however long you want the pause) by dragging it along the timeline.

If you had any sort of "natural sound" in the audio track (static, hum from an air conditioner, etc.) it will be obvious that there is a 3-second break in-between the two audio segments. To fix this, use that "natural pause" of 2 seconds you mentioned, cut it to make it its own segment, and copy/paste it several times to fill the audio void, shrinking the last segment as necessary to make it fit perfectly.

Hope this helps!