My carbs were at about 150g. I was having to do alot of physical activity I wouldn't usually have done. I had only recently cut my carbs that low and I guess my body wasn't used to it. Hence I got a bit woozy etc.
same as me pretty much, i'm on 100-150g off-on days, i haven't got sick like that now, but i'm not very active outside cardio/gym.
In the past when i've done lowcarb and gone a long time without a high day, i have crashed and got sick, but haven't had a stabbing pain like you describe. The high day makes it so much easier, but the last couple of days of the 6 day low carb cycle are pretty brutal.