I am not pregnant (yet), but we are trying and I hope to be soon :) I wanted to weigh in on the high blood sugar thing. I hear a lot about 'perfect range' and keeping your sugars at non-diabetic levels. The truth is we are diabetic, it is virtually impossible to keep our sugars in the normal, non-diabetic range. We are going to have highs, it happens, but if we deal with it as soon as possible we cam mitigate many of the complications. The complications come from sustained high blood sugars over longer periods of time, more than a couple minutes/hours.
People (even Nurses) who don't have diabetes don't understand. They just think you must be doing something to make the blood sugar get that high. I have times where I eat the exact same thing and did the exact same insulin dosage as the day before, but my sugars react differently. There is so much going on in your body (even before pregnancy - like one of the other posts said, think about when you get your period, how wonky sugars go because of the hormones swimming around) that it is IMPOSSIBLE to predict what your body is going to do. Yes, you can get a good idea and most of the time you can manage effectively and predict, but there will ALWAYS be those times that your sugar jumps, many times for no apparent reason. I get angry when I read some of the posts and hear from people that doctors/nurses are making them feel bad because their numbers aren't perfect - anyone who thinks that a diabetic isn't going to have some BS in the upper 100s, or 200-300 range sometimes is ridiculous and unrealistic.
I agree with Kimmy on numbers. I have heard other posts of ladies saying their doctor wanted them in the 60-80 range - for me that is too low. Sorry, at 60 - I am having a granola bar to bring it up. I refuse to go around feeling weak and low all the time - I think that is far worse on your body than having it run a little higher. I am happy running 130-150, and I recently read that A1C below 7.0 (like 6-7), actually relate to an average of about 150-170 I think. And if you are in the 6's as a diabetic, you are doing awesome. And if you hitting lows a lot, you are more likely to have jumps as you try to bring it back up - isn't having a more level sugar (even if it is a little higher than 'normal') better than having your body jumping between numbers all the time? (and it seems to me that being low all the time while pregnant would be bad for you and baby).
I have had T1 for 22 years, my A1C has always been in the usually low 6s (except an occasional low 7). I have not had any diabetes related complications to date. I have high blood sugars, it happens. I have had other doctors (not endocrinologist) say something about my sugar being high on one blood draw, and be condescending, and I take it with grain of salt - come step into my shoes for the last 22 years and then see what your tune is.
So that was my rant, thanks for listening, I just think it is important for others, including doctors, to realize that perfect isn't going to happen. We do our best, and as long as we get the high blood sugars down quick (and try to keep them from being too frequent), we will be alright. If you have a doctor that is pushing too hard, or makes you feel bad - FIND ANOTHER! There are plenty out there that will be better for you mentally and physically - and that will translate into healthier T1 and their babies (when that time comes).
Do your best, and try not to worry. Everyone is different and will have different BS that they are more comfortable with, everyone's body reacts differently - you know your body better than anyone else - even your doctor - trust it and trust yourself and you will be a happier, healthier diabetic.
ps - about the changing insulin - that is crazy to make you change 2-3 times in a couple months - if certain types are working - stick with them, just adjust dosages until you find the balance - changing types so much is going to mess with your body for sure, and not get you to the numbers you want!