Hi there. I feel for you. You are likely to be in no fit state to do anything other than rest for several hours after a bad hypo, even the next 24. Your brain has been starved of glucose and the longer it has gone on the worse you will feel. Even when your levels rise you are likely to feel terrible, drained, headache as if you have been hit by a bus. I sometimes think really bad hypos are treated and spoken about almost casually and well meaning advice could be downright dangerous, whenever my Mum had them, at least 50% of the time she was whisked into hospital for observations. You may also find your judgement following a hypo is not so good as well, hence just rest, keep testing, DON'T be in a rush to lower a hypo rebound with yet more insulin, it could shoot you right down again. The aim in a hypo is to get those glucose levels up FAST, pure sugar is what you need followed (after it's starting to rise) with a carby snack. Maybe keep a liquid tube around for next time? Yes, you may go up to 15 but as you say it will start to come down. As I say if you start using insulin too soon you will be yo yo'ing for ever. Hope you feel better soon. x