I had an ultrasound-indicated McDonalds cervical stitch last time. I had it at 17 weeks, and it failed at 22+6.
I will be having a high shirodkar/TVCIC at 12 weeks when I next get pregnant. I looked at having a TAC (a trans-abdominal stitch), but I have a large fibroid that is very near my internal os, so a TAC might be difficult to place.
If I were you, Sunny, I would insist on an early trans-vaginal scan at 8 weeks gestation to get a base length measure of your cervix. If she scans you at 16 weeks, and has never taken a cervical measurement prior to this, it might not be immediately clear whether your cervix is shortening or not.
Yes, there is research evidence to suggest progesterone helps to support pregnant women with cervical issues. I took pessaries from 17 weeks. In hindsight, I should have taken them as soon as they were suggested (it was something like 13 weeks). Next time round, my care plan is for weekly progesterone injections.
If you can, it is really worth talking to a regional specialist at a teaching hospital about your loss -- someone who specialises at late miscarriage or premature birth. What I found was that a lot of local consultants are so busy dealing with their case load, they aren't always up-to-date on some of the advances in more specialised obstetrics areas. I've also had registrars tell me things that aren't exactly accurate (such as the cervix not being "load-bearing" when there is evidence to suggest it is, to some extent).
Also ... prior to my first pregnancy, I had no idea that I could have a problem with my cervix.