Hi Terran! I'm sorry you have a diabetes diagnosis - welcome to the club nobody wants to join.
My advice is to start eating to your glucose meter. Do you have one yet? If not, ask your doctor for a prescription for a meter and test strips for it. If that won't be covered by your insurance then make the investment out of pocket - it will be your very best tool in the fight to reclaim your health.
The diet typically given the newly diagnosed is almost always too high in carbohydrates to make the improvements you need to make. I'm an Atkins advocate because those are the guidelines that have helped me bring my blood sugar under control, but my meter is what really tells me what I should be eating - and what I should not.
Here's the testing schedule I use:
FBG - I take my BG as soon as I wake up in the morning. This is my Fasting Blood Glucose. It's a good baseline number and the one my doctor likes to see.
When I eat a food or meal that is new to me or untested, I test:
Right before the first bite - This tells me where I started
One hour after the first bite - This (generally) tells me the "peak"
Two hours after the first bite - This should be back to the number I had right before I started eating
I write down all of those numbers. If my peak number is too high or the two-hour number is not back to the starting point, then I know that's a food I either need to avoid or reduce in quantity and test again.
You won't have to do this forever - I still always get my FBG, I test any new foods and I test around exercise (but that can be a topic for another day). Some days I only test once, some days it's five times or more. That's really rare though
As for your energy levels, it could be any number of things.
1. It can be depression - situational or biochemical. Keep an eye on it. It's not uncommon for us to struggle with depression.
2. It could be the reduction in carbs - the "carb flu". If you search this forum you'll find some remedies for this, including upping salt intake.
3. It could be your blood sugar is coming down and making you feel "low" even though you aren't truly low. When your BG runs high for a long time, you get used to it. When it starts coming down, or if it's swinging high/low more or more often than it used to, you may have symptoms of a blood sugar low. Depending on what medication you're taking your doctor should have given you some guidelines about what is truly low and what to do if it is; if not, please say so. Also double check with your doctor.
There is a ton of information on this forum and others. You'll be overloaded. It's going to suck - many parts of this suck. But you can do this. You CAN, and you WILL feel better. You will get a hang of this! And we will be here for you along the way. Please, ask questions, read all you can and reach out if you need help.