Hi, don't you hate Friday appts! I had my 18wk scan with my last little man on a Fri, read the report which said I had mild shortening of the cervix, and my appt wasn't until Monday! I googled myself silly and freaked right out. At 29 weeks the cervix can naturally start to shorten, but I am not sure if funneling is normal at that gestation or not. Did the sonographer say anything about it? I am sure if they were concerned they would have spoke to you straight away, I would just lay low for the weekend, literally lie down. It can't hurt and then on Monday your Dr will be able to clarify things for you. If you have any increased/different discharge/bleeding/spotting, contractions, extra pressure or just don't feel right go into your hospital for another check up.
Good luck I'm sure all is fine.