I had a similar issue last month, and honestly - I increased my calories (and carbs, but not by a lot). Only 150 more cals/day, but at least I'm not so fatigued all the time now and not falling asleep after lunch anymore. I also started tracking my potassium and increased it - but some days I still can't hit my goal. But both of these have helped me.

ETA: I haven't noticed any weight gain from the increased calories.

Caloric intake is the key when you have increased your workouts/exercise activity.

I just recently had some numbers run because Ive incorporated strength/weight training-related exercises... my clothes the past week are getting roomy on me and Im LOVING it....

I do believe, and mind you this is only my personal opinion, I do believe that the meal you decide to have in the morning should have a well balance to them and perhaps a slightly larger count on the carb-intake.

I didnt even realize how horribly low it was until I damn near passed out from the pain of the migraine I had. When I reviewed my intake, I had only consumed 4 net grams of carbohydrates.... UGH, not good! Had myself checked by the Endocrinologist just to make sure there werent other things going on, and I brought it up to her about my morning breakfast being extremely low on total carb intake. She had suggested to get at least 25g of healthy carbs in for the morning meal, but for me, not to go over 40g for the meal itself..

So, I planned out some breakfasts for the week to target that ... and SONOVAGUN! I felt 100% better!

For me, I needed to make that adjustment for my unique situation/medical health/prescription intake - all of that factored in together.

Experiment with your intake but do increase your caloric intake where you are going full force with the workouts that you are doing... (By the way, that is awesome!)

usually I just add more quality sodium and potassium and I am good. If I eat too much protein I also get like that, so I up my fats. My protein needs are fairly consistent (on my carb refeed day once a week I lower the fat) -- basically fat and carbs trade off, fat + carb for me is a kiss of death to the scale. But for me, my body personally, I need the one day carb-up. My body still runs on FAT (just like ketosis) as it is just a single day, and the next day I have only fats (fat fast) morning only with coconut oil in my coffee (blended in a blended with cinnamon and a bit of unsweetened cocoa - tastes JUST like a latte!!! no cream, just unsalted butter and coconut oil whipped on high with my brewed coffee for 30 seconds, super yummy). But this speeds up the return of a good ketosis apparently. This coffee gives me a lot of energy and easily gets me through to about 2 when I eat normally again and start to fit in that days calories.

Not sure what will work for your plan and your body physiology, but just try a few things (even making sure you are eating enough calories etc) and maybe you can narrow it down. Best of luck!