Dear Gayle,
Sometimes I think the human body does weird stuff all on it's own. I have a 2 yr old diabetic so i suppose it is expected that he should go a bit haywire now and again. There seem to be just too many things to affect blood sugar. I contend with activity, weather, diet changes, stress, growth, illness (I hate this one) and juggling insulin. You would also have some naughty hormones to contend with.
I have had a similar problem to you and was finding myself giving my son more and more insulin. I got new pens and then had a massive hypo and dropped the dose back down. I guess they were a bit worn out or maybe I had dropped them a bit hard one day. You don't say wether you use pens or syringes.
Anyway, you might be getting so worried about it that your blood sugar is going up. Hope you find yourself in range soon. I've read that people sometimes need to change injection sites or needle sizes also.
All the best, Jen.