Blood sugar levels

I am 3 days past the scary ER visit. I am not taking the blood pressure medication. I am keeping a close check on my blood pressure and it's been good. Always under 130 top and 90 bottom. I do random checks to see the range. I am also looking at my blood sugar levels. I am doing very random checks . I had dinner and checked it right away and it was 166. I rode my exercise bike for 5 minutes at 6 mph, then checked it again and it was 116! Friday morning at 7 am was the last time I had caffeine. I am starting to feel better and no headaches. I slept so deep last night that the alarm clock was at half power when I noticed It . I normally would wait for it to go off before getting out of bed.