First off, congrats on your pregnancy! I'm 6 weeks along with my second (my daughter is 20 months old) so we're really close to each other!
The CGM should hopefully help a lot, once you get used to wearing it and calibrating it correctly. I will warn you that I HATED my CGM for about the first month. I thought that it was wildly innaccurate and and super pain in rear. In the beginning, it doesn't save you any finger sticks. In fact, I was checking my blood sugar much more often just to check if it was reading correctly. But hang in there, you get used to it and used to when the right times to calibrate are for you and once you hit that sweet spot, the info is invaluable.
It is very common to experience a lot of lows in the first trimester. My doc explained it to me in my last pregnancy and I can't remember entirely, but something about the rapid growth of the baby in the beginning - all the baby's organs and body systems are forming and it's a lot of work and makes you really, really insulin sensitive. Be prepared to evaluate and adjust basal rates and carb ratios every week or so. And try to be very conservative about corrections, since you're not entirely sure yet what your body is doing and how it's adjusting. He warned me that weeks 8 - 10 are particularly problemtic for being insulin sensitive and to watch out for lows and adjust accordingly. Once you get to the 2nd trimester, it will change and you'll be more like what you were before pregnant (insulin and blood sugar-wise). And then somewhere around 22-24 weeks - BOOM! Insulin resistance kicks in hard and you need to constantly adjust the other way. I was taking triple my pre-pregnancy doses when I hit that stage. But I'm sure your doctor/CDE will be working very closely with you to figure out basal rates and carb ratios every step of the way. I met with my endo every 2 weeks for the first 2 trimesters and every week in the third. It sounds like a lot, but the visits were really quick and your doc may even do some of it in email or on the phone.
I also find it helpful to moderate my carb intake at every meal/snack. I really try to not eat more than 40-50g of carb in one sitting. This helps me tremendously with my post meal spikes. (FYI though, I'm not always perfect. Last night I ate a huge plate of pasta because it just sounded good. Don't beat yourself up and allow yourself to indulge every once in awhile so you don't go bonkers.) And try to stick to carb sources like whole grains and vegetable carbs (sweet potatoes, peas, etc.) At snacks, I try to eat a little protein with carbs for snacks. Apples and peanut butter, cheese and crackers, etc.
If you are having trouble recognizing lows, I would probably recommend frequent testing for you for the time being. You are going to be increasingly insulin sensitive over the next few weeks and you want to catch lows before they get too terrible. Don't worry too much about how highs and lows affect the baby. My doc told me that individual numbers aren't what to focus on - it's the trends. So as long as you're not 300 for days straight, you're fine. And lows won't hurt the baby - unless they cause you to hurt yourself! All women (even non-diabetic ones) run low blood sugar in the early weeks of pregnancy.
Hope that helps! Congrats again and good luck!