I dont know how low your carbs dropped but I know that when I was doing serious strength training I needed 40-50g of net carbs a day to really stay normal and get a good workout in. This was about 2 hours of intense weights followed be 45-55 minutes of high intensity cardio (some days I would skip the cardio if I didnt have the energy).

One of the problems I encountered when switching to low carbing from low fat is that I was a volume eater and I would never feel satisfied unless I ate a certain amount of food. It was totally psychological. It took a long time for me to really transition into listening to what my body says and understanding that it isnt the quantity of food that I ate but the quality. Learning when I am satisfied even though I didnt eat everything on my plate.