Nattie- I always found on the cycle following a stim that I ovulated at least 5 days later than normal, around CD 19/20. All the tracking BTs had me looking like a junkie and it sucked badly going in every morning because I 'wasn't there yet' grrr. Good luck for tomorrow!
Lillac- whoa, lucky you're starting mat leave next week! I suppose most things would seem tiring when you have a growing bub draining all your energy. I actually find that running gives me a boost . 3 days a week I run during lunch break (about 4.5km), then I do a longer run on Sundays. C2S is 14km, so its not like I have to train for a marathon lol.