I have exactly that feeling at the moment
@Tanny35 - at the end of the week before last I began to feel low all of the time, and I was testing, testing, testing - all fine.
Then my need for basal insulin suddenly rose dramatically and I realised I'd been going down with something - sinusitis, in fact. Am now just over halfway through a course of antibiotics for it, and I'm still feeling hypo all the time. But actually I'm not hypo - it's just that for me, feeling poorly feels the same as feeling hypo....
And I've felt like this for over a week now - am hoping that the final three days of amoxicillin kick the infection!
Hope you feel better soon,
@Tanny35 - sending a virtual hug!