I think if you were to go to the hospital and they examined you, it could make you more disheartened tbh.
With ALL of my labours I have been told the following, DS1 'you are to comfortable to be in established labour, (and after waters went) it could be 12-24hrs yet,had him 1 and a half later.
DS2 you are only 3cm, and (on feeling my tummy during a contraction) 'they are not very strong!' Well, I labour in my back, again after trying to convince me to go home had him within the hour and it was panic stations as they had left me in a side room and then had to get me over to delivery!
DD was Home birth, I had wised up at this point and I actually put in my Birth plan, 'do not tell me where I am up to, I will agree to examinations but I do not wish to hear your opinion on how long it will be. I will let you know. Again, examined as waters had gone and was 'on the clock' at midnight found to be 3cms, noted exchange of 'we are going to be here all night' look between midwives,but they did not comment. DD was born in the pool 1 hour 40 mins later! 
Even at that point when I said her head was crowning, I recall a midwife saying to my DH it must be the waters about to pop (hind waters had been trickling)!
So, I guess what I am trying to say is that it really can be only speculation, they cannot predict your body, which is doing a great job so far!
Personally, rather than another sweep I would enjoy a bit of intimacy with your DH, if you feel like it! Much more fun and again great for releasing that tension!
Only you can decide if you want another sweep, see how things are going, Friday is an age away and things can kick off at any time! 
And get Chubs with her Pate and Champagne! 
Now that's my idea of Latent labouring! (makes note for 8 weeks time when DC4 due!)