The Critical Time Period

I have officially entered the scary time of my pregnancy.  I am 17 weeks 4 days today.

My cervix was stable on Tuesday with a CL of around 3.4cm, it's hard to get an exact reading and they measure it multiple times!  My last appointments my CL was 3.3cm, 3.6cm and now 3.4cm so that is great.  There is no funneling or any sign of changes taking place.  The cervix is a weird organ and can change length constantly but it is unlikely, but possible that it could shorten dramatically by next Tuesday.  Dr. P just said to really watch things this week, abnormal discharge or cramping is the first sign something is wrong.

If I were going to have any cervical issues it would likely happen in the next few weeks so I am KMFX that my cervix stays nice and stable!
The other fear comes from losing Lindsey. I checked in to the hospital at exactly 18 weeks with her and had her 5 days later at 18 weeks 5 days.  Just approaching that time period in this pregnancy is terrifying.  I would love to say that I won't be nervous anymore after making it to 19 weeks without complications but that would be a lie.  I am going to be terrified until we reach 26-28 weeks when our little guy has the best chance of survival if he is premature.  Even being born at that GA is risky and he can end up in the hospital for weeks or months but we are just hoping beyond hope that I can carry him to full term, 37 weeks.

Another thing that I learned is that I am GBS + or Group B Strep +.  Many people are actually, I am just a chronic carrier.  Dr P actually thinks that this may have caused us to lose Lindsey last time because GBS is powerful enough to cause a bad infection and cause premature birth.  However, the doctors did not do the right tests after we lost Lindsey to determine what kind of infection was present.  They jumped to conclusions and decided I had IC without looking into any other possibilities, which makes no sense to me whatsoever but you can't change the past right?
After looking over my medical history with Dr. P, I tend to agree with her that the infections was first.  I did some research about GBS and my symptoms did fit.  We won't know for sure, ever, which is hard but we can make some educated guesses about what happened.
The placenta was severely infected and possibly even Lindsey.

So the biggest fear for me right now is having or getting an infection and not knowing it.  There were really no symptoms last time that would have made me think I had an infection besides the dilating but by that time I was very infected and very sick.  Dr. P indirectly said that I was lucky to have made it out of the hospital with my reproductive organs and my life.  She also disagreed with the course of treatment that I was put on.
Ok, back to infection.
I have already had GBS found in my urine and was put on ampicillian QID for 7 days to clear that up.  I make sure that my urine is checked for GBS at least every month.  I think they will do it when I ask actually because I told them that they were doing it this past appointment!  I am just totally terrified that GBS has infected me and that I won't know it and when I think about that I just panic so I try to just tell myself everything is okay.  I am going to express my concern at my next appt. on Tuesday so that maybe they can do something, like blood work or tell me something to ease my mind.  I'm just really freaking out about it more and more as i approach 18 weeks.