(((hugs))) - thinking of you. Unfortunately I have been in your position too, my PPROM happened at 20.6 weeks - no warning, I had light pink loss rang the hosptial I went in to be told I had lost my waters totally (had a shower before the loss so assume they went then). I was very heavily lent on to have a termination, I too decided to let nature take its course.
I was in hospital on bed rest for 6 1/2 weeks - had anti biotics, our hospital won't give labour supressing drugs (unless they need to transfer you to another hospital) don't give amnio infusions - and gave me very little advise just bed rest. I got through till 27.1 weeks (after being told i WOULD go into labour within 24 - 72 hours)sadly we lost our son due to hyoplastic lungs and extreme prematurity. BUT i have read many stories on the net and in magazines of people who have had pprom at my gestation (or before) and gone on to have a healthy baby. There are no hard and fast rules with PPROM.
Stay positive and get as much information from your doctors and care providers as possible.
If you want to PM me please do.