Getting straight information is tough... I think mostly because people (including doctors) just don't have enough of an education on this. That is my belief anyhow. Not that this is ALWAYS true, but I find that a Dr. is more educated on these issues (much of the time) than the folks who post on the internet (myself included). You don't know who is posting... some people have great intentions, but think they know everything. For example, I have a sister who is so well versed in medical terminology, she could convince anyone that she is a doctor! In fact though, she is a very, very lost drug addict who can manipulate anyone, and is very convincing. So, who knows what you may be reading. Same goes for the question you asked about 16mg vs. crumbs... do I know the answer? No, not really. However, let's use a little logic here... does 16mg do the same thing to YOU that a crumb does? Nope... so chances are, it DOES make a difference. Can I promise that? No, I can't.
Your question about 24 weeks.... again, not sure how that works. I know that with your average narcotics (such as codeine, etc...), studies show that they should not be used in the 3rd trimester, or at least in the last few weeks of pregnancy, in order to help avoid having your child become addicted. Call your high risk doctor and ask. Even if he is not your regular doctor, there is no reason to not just pick up the phone. I would be very curious to know what he says.
in fact, why not call that high risk doc back and ask him to reassure you? I am POSITIVE that you are not the first of his patients who is going through this, or has gone through this. I bet he has MUCH worse that he has dealt with. If I had that, I could have mentally made it through withdrawals much easier. By the way, do you realize that you are already experiencing withdrawals? That creepy crawly feeling (which goes away, I might add!!! Sooner than you think

) is part of that. So is the RLS that you may or may not get (that lasted me about 3-4 days... not fun, but not the end of the world either). The thing that frustrated me most (after the not so comfy feelings like the anxiety and the "What is going to happen next" feelings was that I had, um, bad stomach. I was needing to use the bathroom quite a bit, and had to wonder if I would ever have a 'normal' BM again. I am still not 100% in that department, but SOOOOOOO much better. I just make sure to keep hydrated, and when times were a little tough, I stuck to a BRAT diet (banana, rice, applesauce and toast). It helps! My point about reminding you that you are currently IN withdrawal, is this.... why drag it out? You are down to crumbs now, and if you can get your mind around it, you can make the change that you know you want to make. If you stay positive, you may be surprised that it is much easier than you thought. I know I was. Your brain is a powerful thing, and if you let it rule you, it will tell you not to stop... it wants the meds. It wants you to take them. You can remind your brain that it is a mental thing, and that you will be fine. Say it out loud. Listen to calm meditation music, go to yoga classes (those are FANTASTIC), get massages... you see where I am going with this? STAY POSITIVE. Literally, the minute I said, out loud "I am going to be OK", I was. 3 days after my last dose.
Keep me in mind when you are scared. Keep me in mind when you are sure you won't make it through. Keep yourself busy to pass the time, and before you know it, you will be at day 3, then 4, then 5... I marked them on a calendar... it did help!
Hang in there. I am here for you. Call your doctor... he is there for you too!