Quoting Amelia Margaret:" My water broke at 15 weeks and I had that pressure feeling starting at 12-13 weeks. I know if I'd only ... [snip!] ... I have taken things into my own hands and paying out of pocket for my TAC in April. This will NOT happen to me again."
Yeah 15 weeks is really early, although i guess if my cervix wasn't checked, it could have happened last pregnancy to me too. I am pretty shocked that your high risk dr didn't look at your cervix. I think it's pretty standard for most peri's to get a base measurement before any sort of changes take place. I have heard some pretty amazing stuff about the TAC.
I've had 2 mcdonald's and a shirodkar. Because I have a ton of non-functioning (yay for massive amounts of useless cervix! lol) cervix, a regular TVC works for me. I also have a lot of contractions around 34 weeks, so I need the stitch to be removable. If it wasn't removable, I would have had to deliver earlier than I have been able to. (39w5d with my 2nd pregnancy and oldest son, 37w1d with my middle son, and 38ish (although they suspect i was earlier than they thought) weeks with my youngest).
I hope things work out for you and you have a very long and boring next pregnancy.