Joelcam,
Its not unusual to have a bad mood swing after a hypo, this was subject was discussed on the forum only a few months back, but can't seem to find the link. I often have a bad head for a few hours, and don't make very good company, although I normally just go quiet rather than be in a bad mood.
Take note of the advice offered on the 'Type 1 and Bodyfat' thread that was offered to you about running your bg as low as 4, as suggested you could possibly already be hypo at this level taking into account that bg meters can be inaccurate as much as 10-20%.
Nigel