TID 51 years: Before answering your question. What are you doing to prevent this happening again?
Then to answer: It depends with me on what quickly my BSL falls. Quick fall = adrenaline -related symptoms as you describe:
pallour, tremour, profuse sweating ( and my wife notices the smell of sweat)), rapid heart beat, even a feeling of great energy and curiously in the past few years a numbness of my front left thigh: that may then go onto the brain-related troubles like numbness of my face, a feeling that my arms, face and sometimes legs are oversize and out of proportion ( like the feeling you get when you have a local anaesthetic numbing you for a dental procedure). irritability, other emotional upset like crying very easily, clumsiness, sometimes repetitive movement ( I was described one one occasion to be doing pushbike cycling movements with my legs whilst laying in bed , another time I went the the local swimming pool with friends and after changing into my swimming togs I was found trying to put an imaginary token into the gate at the entrance to the women's change room!!) I have extreme insatiable hunger and at others nausea and anorexia, difficulty walking straight, co-ordination is shot for all sorts of activities including sex, a feeling of coldness ( they did a study on diabetic patients in hospital and found that their temperatures dropped around the times of hypos),.muscles twitching with some sudden arm movements, difficulty focussing on writing etc, difficulty actually writing both in co-ordination and finding words, doing arithmetic. If the fall of BSL is slow, I hardly notice the adrenaline symptoms and just note the numbness in left thigh, some difficulty thinking, increased irritation etc. My hypo symptoms became easier to recognise after the 45 year mark on insulin when I switched from intensive basal-bolus insulin injections to an insulin pump. The improved blood sugar control, reduction in fluctuation allowed my sensitivity to hypos to improve.
Also I found that I can be testing myself whilst in the adrenaline-shaky stage and sometimes the result comes back low, like you described, or high. The reason for the second is that the liver and muscles have been influence by my body's release of glucagon and adrenaline to release glycogen (sugar storage ) and the blood sugar has bounded up (= rebound). If the sugar is high I have a devil of a time to not eat as the hunger is powerful and I figure that I have over the years associated hunger and then eating as a way to combat hypos or prevent them. Please try to reduce the chance of your hypo happening as much as you can!! and Good luck, Best wishes.