mitzi sorry to hear about your mc. I too miscarried in March but have only just got round to my first cycle. Good that you got a clear temp rise too, as it means you probably ovulated so body is back to normal. Can you think of why your temp might be all over the place this cycle? Have you been travelling, waking at different times, sleeping badly? Stressed? Be good if you could link to your chart so we can all have a go at analysing it!
As for OPKs I actually prefer the CBD ones that give you a smiley face, there's no staring at a line and wondering if it's as strong as the control. However, with my long cycles I can't really afford to pee on £2 every day for 10 days so I'm currently using some very kindly donated internet cheapies. I've also used the boots ones and found that they were similar to the internet cheapies. If you think you ovulate fairly late in your cycle then it's worth buying a pack of 30 of these cheap test strips off Amazon or Access Diagnostics.
The best time to test is in the early afternoon as that is supposed to be when your LH peaks. However, if you get through a whole cycle without a positive opk it might be worth testing twice a day - say 11am and 6pm - as it might be that you just have a very short surge.
To be honest - if your cycles are regular then once you've worked out your ovulation day from charting, your best bet is to start SWI 5 days before you expect ovulation, then keep going till you've got a clear temp rise.
Speaking of which....I think I've got a positive opk tonight. Its not quite as strong as the control but its a hell of a lot darker than anything I've had over the last few days. I reckon it's the start of the surge and I'll get another positive tomorrow and maybe ov on Saturday. Woohoo! 