It's decent of you to post this.
I did feel your response was totally out of character, but refrained from further comment. Now you've explained, I fully understand and commiserate. We all have good and bad days. As I said before, I enjoy your posts and think you're a great addition to the forum.
I'm not naturally combative, but when posters like TLG attack me, I'll be damned if I'll roll over and take it.
MS is a terrible condition to endure. A dear friend contracted it early in her life and it was harrowing to see her decline. though even that had its humorous moments. Like the time her foot slipped off the pedal of the automatic car she was driving and she ploughed into another car. It's irate driver stormed towards her. She slowly emerged, there was a lot of shaking, and when he took stock of the situation he was apologetic personified.
It does help us understand our fellow posters when we know something of their back-story. I've met several and wouldn't dream of being aggressive towards them - apart from TBG, Tuerto, tforturton and Mrs SR of course.

You've just made a great day (an old school friend phoned out of the blue after 60 years this am), even greater!