Hi TamiRabbit,
Welcome! I understand what you're going through, it happened to me too.
I'm a Type 2 diabetic and I never got the energy boost that everyone on LC gets. It wasn't until I read some threads here about the need for supplemental potassium that I had any idea what was wrong.
1st: I hope you take a multi-vitamin. Any Forte or Super one will do, sugar & starch free, of course. While I'm onto supplements, a calcium/magnesium supplement is essential too.
If you are drinking lots of water (and you should be) for the proper elimination of excess ketones, then your body is becoming depleted of potassium. The easiest way to up your potassium intake is to buy No-Salt or Half-Salt (salt & spice section of your grocery store) and use it in cooking or sprinkle on at the table, just as you would use salt. This is more pleasant than dissolving some in a glass of water & then drinking it. Blech!
EPA oils(fish oil) or Essential Fatty Acids, as suggested by Lisa N.
These are excellent for anyone to take for good health. Our body cannot make this nutrient & we must consume it in our diet or by supplement.
Lack of potassium causes headaches, achiness, fatigue, muscles aches (and in my case, grumpiness). After a day or so or using potassium chloride you'll start to feel better.
Personal anecdote: I started Atkins Mar 26, began using Half-Salt about 5 or 6 weeks later. Began to feel better, more energy etc. The first week of June I was out of town on vacation & didn't think about taking Half-Salt with me (silly me didn't even think about buying some where I was). Day 8 I was flying home, I began to feel really tired, achy, grumpy etc. Just plain miserable! I'd had a great holiday and didn't know what was wrong with me. 4 whole days later I finally figured it out & restarted using No-Salt. I hope to never make this mistake again (& my family may just disown me if I do
).
I don't know if potassium depletion is your problem or not, but No-Salt is worth a try.
I hope this helps you, and please post again if you have any more questions, or even to report back how you are doing. I believe that low carb is the only healthy way to eat for a diabetic, and it may take a little tweaking to find the optimum for you. IMHO, supplements are critical to successful LC WOL!
Ruth