Hi Bbritt! What an exciting adventure you are about to embark on! I am currently 26 weeks pregnant with my first child. I have been T1D for 8 years. I was lucky in that it did not take us long at all to conceive. I started preparing for pregnancy about a year beforehand. My A1C had been in the 5’s for most of my diabetic life and I was able to get it down to 4.9 before we started trying. I also established an exercise routine and diet/meal routine that I knew I could stick with through pregnancy to make things like tracking blood sugars that much easier (routine is key!). I took the pregnancy test about 5 days before my missed period and got a very light positive, so we found out right away!
I am currently on a pump (about 3 years now). For me personally, the advantages of the pump far outweigh the grievances. For instance, I currently need .125 units/hour basal in the morning, but .700 units/hour late at night. If I was on shots, I would have to find some middle ground and would likely be dealing with lows all morning and highs all night! even the slightest adjustments make a huge difference when pregnancy hormones are driving your blood sugars crazy. With that said, I think the most important thing is that you feel confident and comfortable with the method you are using. You will be making CONSTANT adjustments throughout pregnancy in both basal and ratios, so really knowing what you are doing is key.
BUT, I would highly recommend getting a CGM if feasible. Each change in hormones brings a noticeable change in insulin needs. It is so much easier to look back on a graph and determine what changes you need than to scroll through a bunch of pin pointed numbers on your meter (and it saves you from having to prick your finger 14+ times a day!).
Last bit of advice I have (largely stolen from other great resources I have met on this site), you should absolutely read: Balancing Pregnancy with Pre-Existing Diabetes and Pregnancy with Type 1 Diabetes (Amazon for both!).
I am happy to chat if you have more questions!