Average reading is 4.8. This is low enough for me to hypo. Its true hypo as can taste pear drops and my breath stinks of them. My hubby is a nurse BTW and observed me having them. Just not so good at ladies things. Usually around 5.5 is where I run without an issue. Many thanks
Lauren - at 4.8 you are not suffering from a medically defined hypo. Definitions for that quote readings under 4, or for taking immediate actio, a bit lower. Forgive me, the number escapes me for now.
If you have been running higher, we sometimes feel the drop down, and this may be accentuated by the imminence of your little visitor and the hormones involved.
When you low carb, depending on low strict you are, you may enter a state called ketosis (not ketoacidosis) which is when the body is burning fat for energy. That can be fat you have eaten or your own body fat. A signal for ketosis is elevated ketone levels in the blood and urine. When in ketosis, some people experience pear drop breath.
Do you have Ketostix? It could be useful to try testing your urine if this happens again, and see what shows. It is possible to finger prick test for ketone, but not all meters can do this and the strips are even more expensive than normal blood strips.
If you are concerned about this, then all I can suggest is a chat with a knowledgable health care professional could be in order, but as you may be aware, those really understanding low carb diets are somewhat thin on the ground.