@Geordie_P - Your profile doesn't give us any clues to what, if any, medication you might be taking to help with your diabetes. Could you let us know?
Whilst your fasting number of 3.3 is low, it may, or may not be a hypo requiring action.
Some of us run lower than others, and I am such a person whose numbers run low. My own fasting levels, tested over three years, run between 3.5 - 4.5. I don't think (aside from immediately after diagnosis) I have ever actually seen anything over 4.5 (which would usually be if I am very stressed, or a bit under the weather, or haven't slept at all), but I have seen numbers lower than 3.5. I won't post my lowest as that's unimportant in the context of this thread.
That said, I don't take any medication and look after myself pretty well. Where concerns arise is usually where those taking heftier drugs to lower their blood scores experience very low numbers, as that can be a concern, and need to be treated to bring the numbers up. You may just be like me. At this stage nobody can really know.
As I say, these days, I have ranges I run in, but if I see a tested number outside that range, I usually just wash my hands and do another test, to make sure the test reading is about right. Readings can be influenced if our hands are contaminated with anything, or wet, or indeed, very cold. Our meters, whilst accurate enough, do operate to within a +/-15% margin of error. That is an international legal standard.
Testing is important, so keep at it, and keep contributing to the forum. People are keen to help where they can.
Edited, just to say, what action you take when you have a low number largely depends upon what drugs you take, and how you feel. If yo are not on meds and you feel fine, then just carry on, or maybe just have a cup of tea with some milk. If you feel rough, then you may want to eat something to bring your bloods up a little more.
In this instance, as it was breakfast time (and again assuming you are not on strong meds), in your shoes, I'd just crack on and have breakfast.
If you are taking meds and feel concerned about it, the please do discuss it with your doctor who may want to adjust your meds, or do some further tests.