Welcome to B&B! Can't help with your questions, but wanted to welcome you.
If you're not sure when you're O'ing or when AF is due, I like temping. It tells you all of that (granted, O only AFTER the fact), but OPKs will help you pinpoint when you O (don't do that yet myself...going to give it a few more months - too cheap to spend the money!

damn accountant's brain!

)
If you have any questions, don't hesitate to ask them - everyone's great here!