Get it done, it's a 30 minute office visit.......................
Had mine done 25 years ago, after my 3rd son was born. Had it done on a Friday afternoon....I really could have gone to work the next day. A little uncomfortable but was back to normal on Monday.
The worst part of the whole thing was brining the "sample" back to the doctor for testing, and having to give it to the young female receptionist.