Emmy - Sounds bad, take car of yourself.
As to why I started running. Two reasons. One was the I was to complete a marathon moment of madness that entered my head. I've no ideas why that popped in my head, as I was always awful at running. Slowest kid in the class at school. I was the lanky skinny kid that couldn't run a lap of the school football pitch. Due to that I pretty much avoided any running related stuff once I left school.
Second reason was to spend more time with my ex. She'd taken up running and I thought it was something we could do together. She dumped my arse not long after, so what seemed the more sensible part of me starting was actually not figuring out you're about to get dumped.