I have been doing more shifts ar work and checking my levels more and have sometimes noticed my levels getting around the 4 mark but within 5 minutes reading around 8 so put it down to liver kicking in but tonight I had a slight headache and thought id see what my bs were to find I was at 3 but felt completely fine..... This has thrown me it full on panic I have had one other time like this were I checked my bs and was in a hypo. Could I have had more and not known? Im now really worried about work, driving ect the hypo itself doesnt bother me its not having warning signs! Any advice or opinion would be great.