Unexpected Rise in the morning

So I'm a little confused this morning. I awoke with BS of 7.5. Much higher than i'm used to, it's normally between 3 and 5 in the morning. I had my normal breakfast of protein. Eggs, prawns and some nuts and a green smoothie. Took my normal insulin for that of 3 units and an extra 1 to bring my BS down in range.

By the time I got to work I had my usual cup of tea with a splash of milk and took my levels. 6.6. So coming down nicely.

An hour later and i'm up to 8.5! Hmm. That seems so strange. It's a sharp rise that is unexpected. As if I had eaten something. Any ideas?

Things I'm considering to be at fault. I've been reducing my basal dose. It's too high at the moment as I generally see it drop during the night and at times when i'm fasting. I would expect this to affect my levels but not a sharp rise like this. I only reduced my dose by 1 unit.

I haven't done any significant exercise for a week other than walking for about 20 mins a day. Normally I have 2 - 3 sessions of moderate-hard exercise, but I've injured my knee at the moment.

Perhaps I have an infection i'm not aware about, or maybe i'm getting ill. Don't feel particularly bad. Just the usual sluggish Monday morning.

Lastly I could put it down to the 'voodoo' effect. Those times when you just have a high unexpected reading for no logical reason. Although I like to think there is always a valid reason for a change in BS level.

Other things I'm going to try. Changing my injection site. Changing my basal insulin cartridges. Make sure i'm hydrated.

Thanks for the response. Actually I've had a few twinges in my gut since posting this. So i'm thinking i've got a mild infection or eaten something slightly dodgy for breakfast. Probably that and combination of lower basal and no exercise. Although I had hoped daily walking would keep me topped up.

Thanks for the suggestions guys. I'm now fairly convinced i've just got a mild bug/infection going on. Feel a bit sluggish today and my gut feels a bit bloated. I've adjusted my bolus to increase today's levels by 50% and so far it's holding steady under 6. I'll be monitoring it very closely all day as I always do.

@noblehead I definitely agree 3 is too low. I'm usually about 3.6 - 4.5 mostly, but that's why i'm adjusting my basal dose. If I can get that right first, then I can have more level readings through the night.