To be honest I had a similar situation where I said something with no intention of being bad but the other person took it in a totally different way i.e. in a bad way.
People have to understand this is an Internet
, the other person is not in front of you nor you know what kind of gesture, body language he is using. So you got to weigh what other person said from all sides.
I get quite stressful too specially when I am working for a company as well as running my own business. Trust me running two things at the same time is worst then having two wives!....
maybe that example is not so well suited here!
. Now some people will take it as a joke some won't....See the example.....
I am not sure if you have read one of my post in "Guys only" thread, where I took all my stress from my business side on the forum post (by creating a new one)!.....I'd say if you have any kind of stress, instead of taking it off on someone by replying their post, take it off by creating a new post.
I am sure that works out better then replying someone's thread with stressful head. The main reason is because the other person doesn't know you are that stressed nor he is aware that you might have taken things differently.
Alternatively you can always write underneath that "Sorry but I am pretty stressful at this moment of time" or you can avoid answering the thread. Anything which works out better. Though I would prefer creating a new thread specially after having a big row on miss-understanding previously on the internet.
After all internet is like a big giant family of people living in a same house though have totally different views about every matter.
Hope this helps and hope that you won't take my words in a bad manner.
Saying all that, if you ever have to discuss anything I am right beside you!