Welcome Strawberry, sorry to hear of your mc.
I have a 2 yr old DD conceived after 12 months and like you, I knew nothing about charting and didn't look into it until last year when we began ttc no2. I now realise I ov regularly around cd 24-27, so no wonder it took us a while with DD. Having said that, cycle 5 here with charting and no bfp yet.
I'm taking evening primrose oil, vit b complex and omega 3, 6 and 9 to aid things.
Also had acupuncture at lunchtime - was nicest one yet. My pulses are nice and strong, despite my 16hr work day yesterday. She also suggested DP might benefit from it as she is a fertility and labour specialist and often treats couples for fertility problems, rather than just the woman.
DG if you've ov, I'll eat my cat.
Not using opks this cycle, relying on good old ewcm and temps. They were doing my head in last cycle.
I generally get 4 or 5 days of ewcm, so last cycle we swi every other day for ages but this cycle we are going to swi every night till tues (DP away tues night) and then every night till my temps go up.
chart here
I ignored yesterdays and am going with pre ov.
Strawberry I'd agree with DG and you've possibly ov cd20 - just see what happens and keep on shagging. 
DD never lets us have a lie in, so we generally swi evenings but today, I'm working from home and DP had a later start, so he dropped DD off at MILs where she spends Fridays and came home for a quicky before heading out 
As I'm out tonight with girl friends and he's giving me a lie in tomorrow, seemed a fair way to give him an early night.
Oops, gone on a bit there. 