i get grumpy and i dont know why

yesterday i came home grumpy it seems, but i didn't feel grumpy, i felt got at, and so did my little bro and mum, they felt got at by me and i felt got at by them, and i can't figure out why.
We all tend to jibe each other, and so when people are fragile this can seem a bit more harsh, but i don't know why i felt fragile, or if they did, they both seemed to think i was being attacking and confrontational, and in a way i was, because i felt attacked i was trying to, i dunno, assert myself and my view of the situation, which was that they were getting at me... it was all tiny things, when i say attack, i only mean like a little accusatory statement, but i just wanted to figure out why.
I think perhaps i get a bit paranoid, and so i have a propensity to think people are trying to get at me when they are not, and it does tend to happen in my family because they are all very smart, and despite the fact that we are ridiculously comfortable together i know that i am kind of the 'flakey hippy' who dosen't wash enough, and isn't very logical, and people tend to wonder how i make it through life, because i do things my own rather unique, hard to understand little way. so yea, perhaps it was a bit of that, i a bit of having a tired crabby day.
I think i could have improved the situation by just saying 'hey, i feel really got at' or something or taking a bit of time out, thinking about it and coming back.
I think i could have improved yesterday by also asking this kid that i don't really know but don't really like how he was because he seemed distressed. By trying to figure out why i felt so lazy about cycling and just whinged in my head to myself about finding it difficult. and being more honest and trying to sort out what was going on with fam.

haha, and i better go study do that i don't have to put 'stdy more' on todays lists of things to be done better. :P